By Marwa Rashad, Mohamed Ezz and Yasmine GhaniaLONDON/CAIRO,/WASHINGTON, July 29 (Reuters) - A drone hit a U.S.-owned gas storage tanker at Egypt's Mediterranean port of Damietta, British maritime security firm Ambrey said in an initial assessment on Wednesday, and U.S. President Donald Trump vowed to retaliate against Iran for an overnight attack, as the Middle East conflict appeared to expand beyond its main fronts.

A drone hit a US-owned gas storage tanker at Egypt’s Mediterranean port of Damietta, British maritime security firm Ambrey said on Wednesday, citing an

LONDON: A drone has hit a US-owned gas storage tanker at Egypt’s Mediterranean port of Damietta, maritime security firm Ambrey said on Wednesday, citing an initial assessment of…