An unidentified man and emergency crews rescued two girls from the Yellowstone River on Sunday near Miles City.
Dale Berg, Miles City Fire and Rescue Chief, said the two girls, ages 10 and 14, were swimming in the river when one of them went under and the other tried to rescue her.
A nearby man, whom Berg said the fire department is still trying to identify, jumped into the river and pulled both girls out.
"A citizen pulled them out," he said. "We'd like to know who he is."
After, a fire and rescue crew had to resuscitate the 14-year-old and both girls were taken by ambulance to Holy Rosary Healthcare in Miles City.
The 14-year-old was flown to a Billings hospital, where she continues to recover, Berg said.
"Sounds like she was pretty rough through the night but I heard she's doing better today," he said.
Berg described the rescue as a "combined effort between all of the emergency crews and the public," including fire and rescue, the Miles City Police Department, Montana Fish Wildlife and Parks and the Custer County Sheriff's Office.
He advised people looking to swim to use the city pool or the nearby Spotted Eagle pond for swimming instead of the river. If people decide to swim in the Yellowstone, Berg said people should be cautious.
"It looks deceiving," he said. "It’s a dangerous river and we just encourage people to use your life jackets, if you’re in there at all."