Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270 people dead.

An Air India Boeing 787-8 flight headed for New Delhi returned to Hong Kong shortly after takeoff Monday because of a "technical issue," Indian Media reported.

Markets were lower around the world on Tuesday morning as President Trump left the G7 meeting early and warned Iranians to leave Tehran amid Israeli air strikes on the city.