A small plane crashed at London Southend Airport in Sussex, England, on Sunday, killing all four people on board, according to local officials.

A witness who was at the airport with his family said he saw a “big fireball” after the plane “crashed head first into the ground.”

London Southend Airport in Essex said that it has closed operations until further notice after the police said a small plane crashed at the airport on England's south-east coast on Sunday.