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.”

At least four people have been killed when a small plane crashed shortly after take-off at London Southend Airport on Sunday. The plane operated by Zeusch Aviation in the Netherlands had flown from the Greek capital Athens before heading to Southend.