British police said today 12 men suspected of preparing a terrorist attack had been arrested in a series of dawn raids across England and Wales.
West Midlands regional police said they had detained five men from Cardiff in Wales, four from Stoke-on-Trent in central England and three from London.
"They've all been held on suspicion of the commission, preparation, or instigation of an act of terrorism in the UK," a police spokesman said.
The suspects, aged between 17 and 28, were detained by unarmed officers at around 5am, he said.
A senior Iraqi official had said last week that he believed al-Qaeda was planning attacks in the United States, Britain and Europe around Christmas, one year after a failed attempt to bomb a US-bound airliner.
Searches were being conducted at the home addresses of the 12, an address in Birmingham and a separate address in the capital, the police spokesman added.
Metropolitan police assistant commissioner John Yates, who is in charge of counter-terrorism policing nationally, said the swoop was a large-scale, pre-planned and intelligence-led operation involving several forces.
"The operation is in its early stages so we are unable to go into detail at this time about the suspected offences," he said in a statement. "However, I believe it was necessary at this time to take action in order to ensure public safety."
Reuters