Fans' bags will be checked on entry to the Millennium Stadium

Around 1,000 police officers - 50 of them armed - will police the city throughout the whole of the day.

And vehicles are continuing to be searched at random checkpoints ahead of the tie at the Millennium Stadium.

Some 120,000 people are expected to descend on the Welsh capital for the game, with 68,000 at the match.

Baggage checks

Teams of sniffer dogs have been checking and rechecking locations and road blocks on all of the main routes into the city.

Armed police carrying out random checks have been concentrating on vehicles carrying fuel or chemicals.

Some of the seats have been removed from the stadium and extra netting, stewards and police officers will be in place to minimise the risk of disorder.

Checks will be made of fans' baggage on the way into the game. Police are urging supporters not bring any unnecessary bags into the stadium with them.

Scores of vans have been checked in random searches

Despite the increase in officers, police stress that no specific terrorist threat has been made against the stadium or anywhere else in South Wales.

The vast majority of supporters attending the game would be well-behaved, police said.

But those intending to misbehave could expect a "robust response".

South Wales Polices are advising fans to arrive at the venue in plenty of time for the game and to set off early.

The Highways Agency said it was expecting the motorways and major routes leading to the stadium to be busy before and after the game.

Those arriving by plane can expect to be processed through a separate security area.

'Very busy'

Russ Clements, head of operations at Cardiff International Airport, said six chartered flights - five from Manchester and one from Gatwick - were arriving for the game, as well as 30 executive jets from all over the UK.

Mr Clements said that as holidaymakers would also be coming in and out the airport would be "very busy".