TAIPEI, Feb. 6 -- Rescuers on Friday morning recovered four more bodies from the Keelung River, raising the death toll from Wednesday's TransAsia Airways passenger plane crash to 35.

Rescuers found the bodies about 48 hours after the ATR72-600 turboprop passenger plane crashed into the Keelung River in Taipei shortly after takeoff from Songshan Airport at 10:52 a.m on Wednesday.

Eight people who boarded the flight are still missing two days after the accident. There were 15 survivors.

Thirty-one tourists from the Chinese mainland who had just completed visits to Taiwan were on board the plane bound for Kinmen when the tragedy happened.

The plane apparently lost power and crashed, killing three of its five-person crew.

The exact cause of the crash remains unknown. But two flight data recorders, or "black boxes", have been found and are being analyzed by specialists.