Update: 4 charged with terror offences
Five men have been arrested on suspicion of the commission, preparation or instigation of acts of terrorism, Scotland Yard said.
Anti-terror police swooped on a series of different addresses before dawn as part of a 'pre-planned, intelligence-led' operation.
The men, aged 21, 23, 24, 25 and 30, were all arrested at separate homes in Luton this morning and have been taken to a central London police station for questioning.
Daily Mail: 5 arrested in Luton on terrorism charges
Further reading: Correcting a Guardian journalist