Four crew members sustained minor injuries Monday when a US Coast Guard helicopter crashed during a routine training flight in southeast Alaska.

Axar.az informs, citing The Associated Press, the MH-60 Jayhawk helicopter crashed several miles outside Sitka in a sparsely populated area near Harbor Mountain. The coastal town sits on Baranof Island. The surrounding Pacific Ocean currents limit extreme temperatures but deliver roughly 100 inches (254 centimeters) of rain every year.

Rescuers arrived around 11 a.m., about an hour after the crash, and took all four crew members to Mt. Edgecumbe Medical Center, a statement from the Coast Guard said.

“We are incredibly relieved our crew members survived with only minor injuries,” Rear Adm. Bob Little, commander of the Coast Guard’s Arctic District, said in a statement.

The Coast Guard will investigate the crash. It’s not clear what caused it.