A drone has hit a ​U.S.-owned gas storage tanker at ‌Egypt’s Mediterranean port of Damietta, maritime security firm Ambrey ​said on Wednesday, ​citing an initial assessment of ⁠the incident, Reuters reports.

Port services firm ​Inchcape said in a separate ​message two gas tankers had caught fire at Damietta.

The drone ​hit floating storage tanker ​Energos Winter, causing a fire that then spread to another vessel, Gaslog ‌Salem, ⁠three trading sources familiar with the incident said. Two separate security sources ​said the ​cause ⁠of the blast was a drone strike.

The ​crew were evacuated and the ​fire had ⁠been brought under control, Ambrey said, adding that no party ⁠had ​claimed responsibility.