Scotland Yard said three properties - two in Westminster and one in Barnet are being searched along with a number of cars - after two men were arrested on suspicion of terror offences.
Police said that one of the arrests in Westminster took place at a residential address and not near any major landmark.
More top news
A man in his 50s has been shot dead in Dublin, three days after a fatal shooting at a nearby hotel.
Julie Etchingham meets the original Foxy Lady - her cousin Kathy - who talks of life with former boyfriend Jimi Hendrix in their old flat.
Canada has announced it will end airstrikes against so-called Islamic State in Syria and Iraq this month.