The 12 Marines who were killed last week when two cargo helicopters collided and crashed on the North Shore will be remembered at a memorial service Friday.

The service will be held at 10 a.m. at hanger 102 the Kaneohe Bay base where the helicopters and air crew were stationed. The service is not open to the public but it will be webcast live on the Pacific Marines YouTube channel.

Marine Corps Base Hawaii also posted a video on the base Facebook page thanking the public for their support during the search for the 12 Marine helicopter crewmembers.

The search to recover the downed aircraft continues, but the Marines today were officially declared deceased.

Gov. David Ige has ordered the flags of the United States and Hawaii to be flown at half staff from Friday through Tuesday.

The helicopters and aircrew, who were on a routine night training mission, belonged to the Marine Heavy Helicopter Squadron 463, Marine Aircraft Group 24, 1st Marine Aircraft Wing.

All vessels are prohibited within a mile of the crash site located three miles off Haleiwa small boat harbor while the Marines conduct salvage operations to recover the wreckage and debris of two large cargo Super Stallion helicopters that crashed offshore, killing 12 crew members.

The safety zone went into effect Wednesday and will remain in effect until Feb. 10 or until salvage operations are completed, the Coast Guard said.

Haleiwa Alii Beach Park remains closed, but the showers and restrooms on the Waialua end of the park are open for usage.

Kaneohe Marines aided by the USNS Salvor, a Navy salvage vessel, and Pearl Harbor-based divers are conducting the salvage operation.

All the wreckage and debris recovered will be moved to the Marine Corps Base Hawaii for analysis as part of the military accident investigation.

A debris field was found on the seafloor in 325 feet of water two miles off Haleiwa.

The Coast Guard suspended its part of the search efforts Tuesday after covering more than 53,600 square miles of ocean and shoreline between Haleiwa and Kahuku over five days.

None of the bodies of the 12 Marine aviators have been found.

Besides crash debris, searchers recovered four life rafts carried by the two CH-3 Super Stallion helicopters, which each had a crew of six.