A terror suspect arrested in London's Whitehall has been named as Khalid Mohamed Omar Ali.
The 27-year-old is believed to be a British national who was born overseas and went to school in north London.
In a separate operation, an active terror plot was foiled after police launched an armed raid in north London in which a woman was shot and injured.
Ali was detained by armed officers after a stop and search on Friday as part of an "intelligence-led" operation.
He remains in custody, having been arrested on suspicion of offences under the Terrorism Act and possession of offensive weapons.