LONDON, July 14 (Xinhua) -- Four people were killed when a plane crashed at London Southend Airport on Sunday, local media reported on Monday.

Both the BBC and the PA news agency reported four people were killed. The police have yet to confirm the casualties.

The 12-meter-long aircraft, reportedly being a Beech B200 Super King Air, was operated by Dutch firm Zeusch Aviation. It was due to fly to Lelystad Airport in the Netherlands.

Zeusch Aviation confirmed its SUZ1 flight had been "involved in an accident" at the London airport and its thoughts were with "everyone who has been affected."

Video footage showed a huge fireball after the plane crashed.

Images posted online showed large flames and a cloud of black smoke following the incident on Sunday afternoon. Essex Police said it responded to "reports of a collision involving one 12-meter plane" shortly before 4 p.m. local time (1500 GMT).

Southend Airport said it would be "closed until further notice" due to the "serious incident." ■