LONDON (AP) — A police boat crashed into Westminster Bridge in central London on Friday, tossing officers into the River Thames and injuring five of the crew, the Metropolitan Police said.

Paramedics treated the injured on a black inflatable boat as a police helicopter hovered overhead near the clock tower that houses the bell known as Big Ben.

READ MORE: Train collision north of London kills at least 1 person, authorities say

It wasn't immediately clear what the boat was doing at the time or how it crashed, though the Met said it would be thoroughly reviewed.

Mateo Bilis-Lusevic, a 12-year-old visiting from Chile, said he was on a tour boat with his mother when they saw the crash.