A Boeing 737 plane has disappeared off the coast of Pakistan

A K2 Airways Boeing 737 (AP-BOI) flying from Sharjah to Karachi went missing with five crew members on board.
The flight reported a navigation-system issue and, about 80 minutes in, rapidly descended and vanished from radar off Karachi; flight-tracker data suggests a possible crash at sea.
K2 Airways named the crew, said it is cooperating with authorities and praying for their safety, and an investigation is underway.