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

All four people aboard a a small plane that crashed shortly after taking off from London Southend Airport are dead, police said Monday. Essex Police said that work is continuing to formally identify the victims of Sunday's crash,

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.”