Search under way after Boeing 737 cargo plane goes missing off Pakistan coast

Early flight data showed the K2 Airways plane with five crew on board possibly crashed into the sea southwest of Karachi

A Pakistan-registered Boeing 737 cargo plane with five crew members on board lost contact with air traffic control on Tuesday night after reporting a navigational system problem on its way to Karachi, Pakistan aviation authorities said.

Early flight data indicated the 27-year-old converted freighter operated by K2 Airways from Sharjah in the United Arab Emirates possibly crashed into the sea southwest of Karachi after a series of sharp altitude changes, before a steep final descent, according to flight-tracking service Flightradar24.