SEATTLE (AP) -- Two teenagers were rescued after being trapped in a collapsed ice cave Thursday while hiking near a mountain summit east of Seattle.

One of the boys was freed by rescue crews around 6 p.m. in serious condition with the threat of hypothermia. The other boy was pulle dout a short time later.

TV station KING 5 reported searchers made contact with both of the teens around 5 p.m.

Snoqualmie Pass Fire Chief Matt Cowan said hikers with the teens called 9-1-1 early Thursday afternoon.

The Seattle teens, 17-year-old Alec Corbett and 14-year-old Allesandro Gelmini, were both suffering from hypothermia when they were rescued, King County sheriff's spokesman Sgt. John Urquhart said.

Gelmini, rescued first, also suffered serious but non-life-threatening injuries, Urquhart said, adding Corbett's injuries were being evaluated Thursday evening.

Snoqualmie Pass Fire Chief Matt Cowan says two families with the boys called 911 shortly around 1:30 p.m. Thursday. At about 5:30 p.m., the King County Sheriff's Office said rescuers had made contact with one of the boys. The other one was contacted a short time later

He says the hikers reported hearing a "boom" when the cave collapsed but couldn't dig out the 14- and 17-year-old on their own.

Search and rescue workers say a parent had just taken a picture with the two boys when the snow they were standing on collapsed beneath them and then caved in on top of them.

"Our theory is what's called a moat that forms around the snow. The water and the heat melt it away and they probably got close to the lip and it collapsed," said Peter Linde, King County Search and Rescue.

Firefighters were quickly on the scene, but first responders had nothing to dig the teens out with. They had to wait for rescue crews with snow shovels and ice axes to hike the 1.5 miles to the scene.

"We just got large pieces of wood, just trying to leverage huge chunks out of the way, just trying to look everywhere. We called their names for a really long time. I have to admit, I kind of lost hope after awhile," said witness Matthew Miller.

The cave is about two miles from the 3,050-foot summit of Snoqualmie Pass, about 45 miles east of Seattle.