Riot police escorted people from the Queensway area

His comments come as calm returns to a north Wales housing estate which has seen two nights of riots - the first of which was racially motivated, say police.

Speaking at question time in the Commons, the prime minister said "those who advocate extremism or want to turn their anger on people who are immigrants into this country do absolutely nothing for community relations."

People who advocate extremism of this kind "do nothing for their own local communities and peddle what is a disastrous misconception and misrepresentation," said Mr Blair.

His comments follow two nights of clashes between Iraqi Kurds and others on the Caia Park estate in Wrexham. Thirty arrests have taken place.

North Wales Police have ruled out racism as the cause of Monday's violence.

The calm will reassure a lot of people who want to get on with their lives Christine Thomas Caia Park resident

However, local residents blame refugees and asylum seekers for bringing the area into disrepute.

Overnight on Tuesday, there was a heavy police presence in Caia Park.

And while there was no repeat of disorder of Sunday and Monday night - when police came under fire from missiles and petrol bombs - officers say they made a further 10 arrests during the night.

This brings the total number of men arrested over the past three days to 39 - 12 of whom have been charged in connection with the rioting.

Seven people have already appeared in court with five more due to appear before Wrexham magistrates in connection with the riots on Wednesday.

On Tuesday night North Wales Police drafted in back up from neighbouring forces in order to stop crowds gathering on the estate.

Around 30 police officers dressed in full riot gear and 10 dog handlers, cleared the Queensway Club - a bar on the middle of the housing estate - where many of Monday night's rioters had gathered.

Drinkers were ordered out of the Queensway Club

Officers, some carrying mobile CCTV cameras, then patrolled the estate all night standing in groups on every street corner.

They moved onlookers away and preventing cars from entering the area which was the scene of Sunday and Monday's disorder.

One resident - who would not be named - accused the police of being "heavy-handed".

"We can't even drink in our local without being moved on," he said.

"The police just came in and told us to go home. This is just going to make things worse now," he added.

But estate resident Christine Thomas told BBC Radio Wales that the restoration of calm to the estate would allow people to discuss their problems.

"The calm will reassure a lot of people who want to get on with their lives.

"I think they (the politicians) have got to listen.

"Over the last few days, I've heard various reasons (for the riots) with people upset over different issues."

Trouble first erupted on Sunday with what police then described as "racially motivated" clashes sparked by "an incident" between a local resident and a refugee.

This is not racism run mad, it's criminality pure and simple Chief Superintendent Stephen Curtis

On Monday officers in full riot gear were pelted with petrol bombs and missiles as a crowd of up to 200 ran amok in the middle of the estate where the Red Dragon pub was ransacked.

Residents said a car was set alight, stones were thrown at shop windows, followed by bottles, lumps of coal and petrol bombs being hurled at police dressed in riot gear who were trying to keep the crowd from moving further up the street.

Eyewitnesses described seeing children as young as 10 years old throwing petrol bombs.

The following day, North Wales Police Chief Superintendent Stephen Curtis said the continuing troubles on the estate was down to criminals.

"This is not racism run mad, it's criminality pure and simple," he said, warning the culprits that they would be tracked down.