No indications of a terrorist attack on board the Tupolev Tu-154 plane that crashed into the Black Sea on Sunday have been obtained as of yet, the Russian Federal Security Service (FSB) said.

"No indications or facts pointing to the possibility of a terrorist attack or an act of sabotage on board the aircraft have been obtained as of yet," the Russian news agency Interfax quoted the Russian Federal Security Service's public relations center as saying on Monday.

"Eyewitnesses of the plane crash have now been determined, there is also a recording from a dashboard camera, with which members of the group of investigators are working," the Russian Federal Security Service's public relations center said.

The Federal Security Service also said the main working theories regarding the Tu-154 crash in the Black Sea are "foreign objects getting into the engine, low-quality fuel leading to loss of capacity and engine failure, pilot error, and a technical failure of the plane."

Source: MENA