A medical transport plane with three crew members on board went missing on a flight between Maui and the Big Island.

According to Xinhua news agency, citing a tweet from the US Coast Guard, the Hawaii Life Flight aircraft was a King Air twin-engine prop plane.

According to the US Coast Guard, the Honolulu Control Facility reported losing radar contact with the plane about 15 nautical miles offshore south of Hana, Maui.

"Global Medical Response can confirm that one of our Hawaii Life Flight emergency fixed-wing airplanes based in Maui went off the radar while en route to pick up a patient in Waimea, Big Island," the company statement issued Friday said.

The patient was not on the plane, which lost radar contact at about 9:30 p.m. Thursday, it said.

The patient was not on the plane, which lost radar contact at about 9:30 p.m. Thursday, it said.

"We are in the process of reaching out to their families," the statement said.

"We are in the process of reaching out to their families," the statement said.

The company is also assisting search and rescue teams.

The company is also assisting search and rescue teams.

The Coast Guard said aircraft controllers lost radar contact with the plane about 17 miles (27 kilometers) south of Hana, Maui, in the Maui Channel of the Pacific Ocean.