HONOLULU (AP) — Search efforts continued Tuesday in Hawaii for a helicopter that is missing northwest of the island of Molokai with two people on board.

Hawaii News Now reports debris has been found in the water. The Coast Guard was notified of the suspected down helicopter Monday evening.

The Coast Guard in a release says there were two people on board the Robinson R44 four-seat private helicopter.

Officials say it's believed the helicopter was on a day trip to Molokai, and was heading back to Honolulu when it lost communications with Honolulu tower earlier Monday evening.

Coast Guard Petty Officer 3rd Class Amanda Levasseur tells The Associated Press they are searching with an airplane, cutter and helicopter. The Molokai Fire Department has a helicopter involved, and ground crews are searching the coast.