Four crew members were injured Monday when a Coast Guard helicopter crashed during a routine training flight in Alaska.

It wasn't immediately clear how seriously they were injured, but no one died in the crash, the Coast Guard said in a statement.

The MH-60 Jayhawk helicopter crashed several miles outside of 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 of rain a year.

Rescuers arrived at about 11 a.m. local time, about an hour after the crash, and rushed all four crew members to Mt. Edgecumbe Medical Center, the statement said.

"The safety, well-being, and rescue of our crew members is our absolute, immediate priority," the Coast Guard said in a post on X.

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

This helicopter crash followed a string of three major plane crashes this month.

A business jet crashed on a highway in Laredo, Texas, on Tuesday night, killing one person on board. A B-52 crashed on June 15 during a test flight at Edwards Air Force Base in California and killed all eight people on board. And on June 14, 12 people were killed when a plane on a skydiving outing in Missouri crashed.