Five men have been arrested in Luton on suspicion of the commission, preparation or instigation of acts of terrorism.
The arrests, made at five separate addresses in the Bedfordshire town, were part of a “pre-planned, intelligence-led" operation by the Metropolitan Police’s counter-terrorism command.
The men arrested are aged 21, 23, 24, 25 and 30, and have been taken to a central London police station for questioning. Searches are taking place at all five addresses under the Terrorism Act 2000.
A spokesman for Scotland Yard said: "Officers from the counter-terrorism command have today, Tuesday April 24, arrested five men on suspicion of the commission, preparation or instigation of acts of terrorism.
"All five were arrested at separate residential addresses in Luton. They have been taken to a central London police station where they remain in custody.
"The arrests were a part of a pre-planned, intelligence-led operation.
"Search warrants were also executed under the Terrorism Act 2000 at five residential addresses in Luton in connection with this inquiry and searches are ongoing."