NAIROBI, March 10 — An Ethiopian Airlines Boeing 737 passenger jet to Nairobi that crashed early today with 149 passengers and eight crew members aboard “had unstable vertical speed”, Swedish flight-tracking website flightradar24 said.

“Data from Flightradar24 ADS-B network show that vertical speed was unstable after take off,” the Swedish-based flight tracking organisation said on its Twitter feed. — Reuters