Now, a developing story in London -- what authorities are calling another "potential" terrorist attack.
A man has died and at least eight people have been injured after a van was driven into a crowd of pedestrians outside a mosque in London's Finsbury Park.
Police said they were called just after 12:20 am on Monday, local time, and have arrested one man.
The Muslim Council of Britain says the van ploughed through people leaving prayers, adding that it was a "violent manifestation of Islamophobia" and calling for extra security around mosques.
The latest incident follows a series of attacks in the U.K., including the bombing in Manchester and the vehicle attack on London Bridge.