A US Black Hawk helicopter crashed approximately 32 kilometres off the southern coast of Yemen while the crew was training on Friday evening. A search was under way for one US service member.

The US military said that the incident took place at about 7pm local time.

“US forces in the region are conducting an ongoing search for one US service member who was aboard the aircraft,” the US Central Command said in a statement. “Five US service members who were also aboard the aircraft were rescued by US forces following the crash.

“An investigation will be initiated.”

CENTCOM spokesman Col John Thomas told Reuters that the “helicopter was not very high above the water” when the incident took place.

A helicopter belonging to Japan Maritime Self-Defense Force (MSDF) has lost contact and possibly crashed, said Japan's Defense Ministry early on Sunday morning.

The SH-60 helicopter lost contact around 11:00 p.m. local time (GMT1400) on Saturday during a training off Tsugaru Strait between Honshu and Hokkaido in northern Japan.

Four people were on board the helicopter. One of them has been rescued, and the MSDF is still searching for the other three, said the ministry.

Troops are searching an area of eastern Belgium where a pilot fell out of his military helicopter during an air show.

Three troops had jumped with parachutes from the Agusta A-109 helicopter, but the pilot and co-pilot did not have parachutes, Belgian media report.

They say the co-pilot helped the three jump, but then saw the pilot's seat empty and his door wide open. He grabbed the controls and landed safely.

The air show was at Amay near Liège. The pilot fell several hundred metres.

The reason for the pilot's fall remains a mystery.

An Indian military helicopter crashed in Indian-controlled Kashmir on Tuesday, causing no casualties, local media reports said.

The advance light helicopter crashed in Ladakh division of the region during the day.

All crew members on board were reported to be safe following the crash.

"The helicopter crashed in eastern Ladakh near Tsogstalu helipad," a local news agency reported. "Senior commanders were on board at the time of the crash, however, all of them are said to be safe."

Indian military spokesman told Xinhua they were collecting details of the crash.

A Myanmar military jet fighter went missing while conducting a flight training in southern Ayeyarwady region on Tuesday, Office of the Commander-in-Chief of the Defense Service said.

The G-4 fighter jet lost contact with the ground at 9:30 a.m. local time (0300 GMT) while on a training mission with two other planes northwest of the Pathein airport.

Search for the missing military plane was underway with the use of aircraft and helicopters of the Air Force.

Authorities say a county sheriff says the pilot of an Arizona Air National Guard F-16 jet that crashed Tuesday afternoon was killed.

The Arizona Daily Star reports Graham County Sheriff P.J. Allred said the crash site is about 20 miles northwest of Safford. The F-16 was attached to the Arizona Air National Guard’s 162nd Wing at Tucson International Airport.

The crash was the second involving an F-16 Fighting Falcon flying from the 162nd Wing and the third F-16 crash in Arizona, since mid-2015.

The U.S. Air force has activated a team to investigate Tuesday’s crash.