The US Marine Corps called off its search for five missing Marines on Monday, after a F/A-18 Hornet fighter and C-130 Hercules cargo plane collided during a refueling exercise near Japan.

The service members' next-of-kin have been notified.

The Marine Corps pointed to the missing KC-130's flight data and cockpit voice recorders, and said it was "premature to speculate about wreckage recovery."

The US Marine Corps called off its search for five missing Marines on Monday, after a F/A-18 Hornet fighter and C-130 Hercules cargo plane collided during a refueling exercise 200 miles off the coast of Japan on Thursday.

"I have made the determination to end the search and rescue operations for the crew of our KC-130J aircraft, which was involved in a mishap off the southern coast of Japan and to declare that these Marine warriors are deceased," 3rd Marine Expeditionary Force commander Lt. Gen. Eric Smith said in a statement.

"Every possible effort was made to recover our crew and I hope the families of these selfless Americans will find comfort in the incredible efforts made by US, Japanese, and Australian forces during the search," Smith said.

The service members' next-of-kin have been notified.

"Our most valued asset is the individual Marine," Smith added. "We remain faithful to our Marines and their families as we support them through this difficult time."

The incident is still under investigation. The Marine Corps pointed to the missing KC-130's flight data and cockpit voice recorders, and said it was "premature to speculate about wreckage recovery."

The accident, which involved seven crew-members, occurred around 2 a.m. local time on December 6. One of the seven missing was rescued alive in "fair condition," and another Marine, 28-year-old pilot Capt. Jahmar Resilard, was found dead around 60 miles from Shikoku island.

President Donald Trump tweeted his condolences after the collision and thanked Japan, who assisted in the search-and-rescue efforts

"My thoughts and prayers are with the @USMC (U.S. Marine Corps) crew members who were involved in a mid-air collision off the coast of Japan," Trump tweeted Thursday. "Thank you to @USForcesJapan for their immediate response and rescue efforts. Whatever you need, we are here for you."