A cargo aircraft from the United Arab Emirates bound for Pakistan has gone missing with five people on board. The plane, a Boeing 737-400 operated by K-2 Airways, lost contact on Tuesday night about 155 nautical miles west of Karachi. No wreckage or trace of the five crew members has been found so far.

According to Pakistan’s airport authorities, communication with the aircraft was lost shortly after takeoff. Flight tracking data showed the plane cruising normally at 35,000 feet and 790 kilometers per hour before making a sudden U-turn and descending rapidly. Within five minutes, it dropped nearly 34,000 feet and was last detected at 1,100 feet and 211 kilometers per hour before disappearing from radar over the Arabian Sea.

Pakistan’s Navy and Air Force have intensified search operations, deploying additional warships and surveillance aircraft. Commercial vessels of the Pakistan National Shipping Corporation are also assisting in the search effort.