Search-and-rescue operations are underway after a pair of Marine Corps aircraft were involved in a "mishap" early Thursday off the coast of Japan.
The Oct. 23 incident resulted in the West Coast Marine Corps training squadron launching an investigation into the flight pattern of a T-34C aircraft from Marine Fighter Attack Training Squadron 101.
A US official told Fox News that seven Marines were on board the two aircraft. Japanese officials said two crew members were on the FA-18, and five others on the KC-130.
U.S. media also reported 5 crew on the C-130 and 2 on the F-18.
The circumstances of the mishap are now under investigation, the military added.
"The aircraft involved in the mishap had launched from Marine Corps Air Station Iwakuni and were conducting regularly scheduled training when the mishap occurred", according to a Marine Corps Base Camp Butler statement on Wednesday.
U.S. media say the two planes crashed during midair refuelling but this has not been officially confirmed.
The Marines' statement also indicates that Japanese planes have joined in the search efforts.
First baby born to mom using uterus from a deceased donor
After five months, the uterus showed no sign of rejection, ultrasound scans were normal, and the woman was menstruating regularly. Before womb transplants became a viable possibility their only options for having a child were adoption or surrogacy.