The BBC's Security Correspondent, Frank Gardner, was injured in the attack by unknown gunmen.

Gardner underwent hours of surgery last night and is said to be critical but stable.

The shooting comes a week after the hostage crisis in Saudi Arabia in which 22 people were killed.

Send us your reaction to the shooting of the BBC team.

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Based in Jerusalem I've been following your reports, Frank Gardner, for several years. They shine through as especially authentic thorough and brave. Get well soon!
Anat Almog, York, UK

What has happened to this amazing country of Saudi Arabia? Barbara, Saudi Arabia

On a hot 4th June Friday in Saudi Arabia myself and several other expats gathered for a BBQ. Including our friends Frank Gardner and Simon Cumbers. The day was nice the company terrific. Little did I know then that this was to be the last Friday that Simon would spent on this earth, nor that this was the last Friday before Frank would be critically injured and his life changed forever.

During our day we talked about many things including the dangers of our lives and Simon's and Frank's. They said this is our job, to bring the news to the people. I asked were they afraid, the reply was, "Yes sometimes". Like us we are now afraid of going many places. Frank had enormous knowledge of this country and for Simon it was brand new. Frank said something to me that will probably haunt me forever; he said "One never knows you can be in the wrong place at the wrong time". How right he was.

This killing was senseless, terrible, and unnecessary. What has happened to this amazing country of Saudi Arabia? This place I call my home. For Simon's family our deepest sympathy, and for Frank, we wish him a speedy full recovery. Our thoughts and wishes are for him and his family.
Barbara, Saudi Arabia

I was shocked to hear of the attack on Frank Gardner. I have known him in Bahrain and have ever since followed his reports on the Middle East. He is a fabulous guy and has a great understanding of Middle Eastern life. I wish him a speedy recovery. Frank, Amanda and the kids are in our thoughts.
Marjan Tieben, Almere, Holland

It was quite hilarious and very much reminded me of the kind of humour we used to enjoy Mark Curly Field, Nottingham

Tough it out Frank; I know you will. Sorry I haven't been in touch since 1979! However, Fleur, my wife, and I have naturally seen a lot of you on TV and heard you on Radio 4.

We particularly enjoyed one report you did on the US Special Forces in training. Two soldiers tried to burst through an open doorway and got stuck! It was quite hilarious and very much reminded me of the kind of humour we used to enjoy during our Marlborough days. When you're better we'd like to see more of this sort of thing please!

All the very best. Fleur, myself and Eleanor Savage are all thinking of you.
Mark Curly Field, Nottingham, UK

The shooting of Simon Cumbers and Frank Gardner in Riyadh came as a terrible shock and our thoughts are with their families. Frank is a good friend and always kept in touch during his foreign assignments, usually to email me his latest bird report! He was a keen and experienced birdwatcher and submitted the first bird sightings to come out of Iraq for many years during his visits last year.

His BBC reports from Arabia kept me glued to the radio as he knew exactly what was going on and wasn't afraid to relay it to the world. His knowledge of the Middle East and his fluency in Arabic gave his reports more credence than anyone else could provide. He didn't deserve this - everyone liked Frank and we pray for his speedy recovery.
Colin Richardson, Dubai, UAE

My deepest sympathy to Simon's family and I hope Frank, who I met 14 years ago, has a full recovery. Being a mother and wife myself, my thoughts are with his wife and daughters.
Cristina Machado, Isleworth, UK

We knew Frank, Amanda and the girls while posted in Dubai, UAE. They are a wonderful family and we are praying for them and Frank's recovery everyday. Our condolences to the Cumbers family.
Patrick Heffernan, Washington DC, USA

I am only a kid. I want to be a cameraman when I'm older. I feel very upset about them. I would just like to say - Frank get well soon!
James Sheppard, Bristol

Sincere condolences to Simon Cumbers' family and my best wishes to Frank's family. I used to work with Frank and always enjoyed his clear sightedness on the Arab World and particularly his sense of humour. What a shock to hear of this terrible tragedy. Wishing him a speedy recovery.
Karen, London, UK

I have been watching BBC World regularly for over three years now. My condolences to Simon's family. Hats off to him and Frank Gardner, for the kind of professionalism they have displayed. This is journalism of the highest standards, in arguably the most trying circumstances. Perhaps no one knew more about the terror threats in Saudi Arabia, better than Frank himself. Well done. Get well soon. Wish you lots and lots of luck and good recovery. I'll pray for you. God bless you.
Anurag Bhatia, New Delhi, India

I knew Frank in his banking days, and remember fondly many lunches where he talked enthusiastically about becoming a journalist. I have followed him since on my TV screen and was shocked to hear the news of the attack. I join everyone in wishing him a fast recovery and hope to see him back reporting soon.
Andrea Struik, Phnom Penh, Cambodia

Frank is an ex-colleague of mine from his banking days. I always admired him for his take on life which reflected in his high professionalism both as a banker and the intrepid and incisive reporter that he turned out to be. My prayers are for his early recovery, good health and back on our screens. My sincere condolence to the Cumbers family, may God give them the strength to come to terms with this great loss.
Ghalib Chaudhuri, Singapore

My sincere condolences to Simon's family. As a Muslim I regret this thing happened. If the gunmen were Muslims then I consider them as moronic Muslim fanatics who don't deserve to be called Muslims.
Kamarudin, Malaysia

Frank, we are praying for you. You have always excelled as you were driven by your passion. There is no better journalist we know. Looking forward to seeing you soon.
Ramzi and Dalia Rishani, London, UK

To Mandy and the girls - we wish you strength in a traumatic time and look forward to the swift return of your husband and dad in good health. Condolences to the family of Simon Cumbers.
Cam, Julie and Finn Mathias, Sevenoaks, UK

This incident has been a real eye opener on how dangerous things can be Ahmed, UK

Sincerest condolences to Simon's family. We often take the hard work done by journalists and cameramen for granted; this incident has been a real eye opener on how dangerous things can be. Get well soon Frank - we are all praying for you. God willing you will be back on our screens very soon.
Ahmed, UK

Louise, I hope you read these messages and take some small comfort at this terrible time. I just wanted you to know that my thoughts are with you. Take care of yourself.
Jane Taylor, Bournemouth

To my brother - you were one of the best. A fantastic brother and a great uncle to Eabhan. We will never forget you. All our love to you and Frank. We will look after Louise.
Eimear Cumbers, Navan

My sincere condolences to Simon's family and friends. I know he will be greatly missed by all. I was shocked to hear the news that he had been shot and killed and that Frank had been seriously injured. My thoughts and prayers have been with Frank and his family and I wish him a speedy and good recovery.
Corinne Murphy, Aylesbury, UK

It was with great sadness that we learned of the murder of Simon Cumbers; such absolute waste of innocent and talented life. Our heartfelt condolences to his wife Louise, family and many friends and colleagues. Hold on and keep fighting, Frank. The world needs your knowledge and inspired reporting. Our thoughts are with Amanda and the children.
Brian and Gillian, Oberammergau, Germany

Frank - get well soon mate.
Harry, London

Uncle Simon - for a much loved and adored uncle, we miss you so much and wish you were still here.
All our love, hugs and kisses
Ciaran (9), Liam (7) and Grainne (5), Navan, Ireland

Sincerest condolences to Bob, Bronagh, Stephen, Eimear, Catiorna and Louise. We grew up just doors away from Simon and his family and there was always a sense of pride in knowing him, seeing him on TV or hearing him on radio. God Bless.
County Family, Navan/Tralee, Ireland

My deepest sympathy to the family of Simon Cumbers. A man just doing what he loved and paying a very heavy price. My very best wishes to Frank Gardner and hope that he will pull through this traumatic experience. I loved to listen to Frank when he was reporting he made everything simple and easy to understand. I hope that he will be home with his family very soon.
Helena Hoorn, Holland