Ethiopia's transport minister says flight data from last week's crash of a Boeing 737 Max 8 aircraft had "clear similarities" with last October's crash in Indonesia involving the same model.
Dagmawit Moges told reporters that all relevant data from the black boxes have been recovered and a preliminary report would be released within 30 days.
He did not provide details on what those similarities were, but said they would be subject to further investigation.
Both flights crashed just minutes take off and reports have suggested a new automated anti-stalling system may be the cause of both accidents.
The system apparently forced the planes to nosedive soon after engaging autopilot.