London: The British police announced Monday that the death toll from the crash of a small aircraft at London Southend Airport has reached four, all of whom are believed to be foreign nationals.

According to Qatar News Agency, the US-made plane, headed for the Netherlands, encountered difficulties and crashed within the airport's boundaries shortly after takeoff on Sunday.

Consequently, London Southend Airport CEO Jude Winstanley announced that the airport, located about 56 kilometers east of the British capital, London, will remain closed until further notice, as investigations into the incident continue.

The Air Accidents Investigation Branch, which investigates civil aircraft accidents and serious incidents within the United Kingdom, stated that it is still too early to determine the cause of the crash. It added: "A multi-disciplinary team including inspectors with expertise in aircraft operations, human factors, engineering and recorded data are at the accident site gathering evidence."