Andrew Pemble was saved from injury because he went to bed early

Father-of-one Andrew Pemble, 41, escaped uninjured because he had gone to bed early - as suicide bombers broke into the compound in which he and other Westerners were living.

Two Britons were killed and at least 15 were injured in the explosions in Saudi capital Riyadh on Monday night.

Mr Pemble, from Ammanford, west Wales, helped rescue people from the rubble after the blast, which ripped the front off his block of flats.

"The bomb went off and it was absolute bedlam - it was the biggest bang I've ever heard in my life," he said.

"My property was probably one of the closest to the blast and when I got out of bed everything was wrecked.

"My sofa was thrown across the room, a brick has smashed into my fridge and it was bedlam.

"I went out and helped - there were people with arms and legs missing and I helped a Lebanese family escape."

The explosions ravaged the luxury housing complexes

Mr Pemble, a technology teacher at a British primary school on the site, is now back in the UK with his wife Kathryn, 38, and 10-year-old daughter Isobelle.

Four of his colleagues were injured in the explosion.

Shortly after the blast, he managed to call his wife to assure her he was alive.

Her parents Ken and Marian Brown, from Llandybie, said the experience had been "traumatic".

"We are all so relieved - he really was in the middle of it and it could have been much worse," said Mr Brown.

'Hero'

Mrs Brown added it was fortunate he had gone to bed, because his bedroom was at the back of the building.

Andrew Pemble has now been reunited with his family

"The whole front of the block and his balcony were destroyed," she said.

"We think he was very brave to go back and help the injured.

"It seems he was something of a hero."

Following the explosions, alerts against possible terror attacks have been issued around the world.

Warnings relating to a number of countries in Asia, Africa and the Gulf have been issued.

The alerts reflect concern that Osama Bin Laden's al-Qaeda network is planning more attacks on Western targets.