A man has been arrested on suspicion of attempted murder after a man in his seventies was stabbed in a mosque near Regents Park.
Police were called to London Central Mosque at around 3:10 p.m. on Thursday.
The victim was treated by paramedics before being taken to hospital. He is in a non-life threatening condition, police said.
Images posted to social media showed a white man in a red hooded top, jeans and bare feet being pinned to the floor by police officers inside the mosque, as others, including a small child, watched on.
A video also showed a knife on the floor under a plastic chair.
In a statement, the Metropolitan Police said: Police were called to a mosque in Park Road, NW8, at 15.10hrs on Thursday, 20 February, to reports of a stabbing.
Officers attended along with paramedics from the London Ambulance Service (LAS). A man was found with stab injuries.
He was treated by paramedics before being taken to hospital. We await an update on his condition, they said.
A man was arrested at the scene on suspicion of attempted murder.
A crime scene is in place around the mosque.
A spokesperson for the London Ambulance Service said the man had been taken to a major trauma centre.