Two teenage brothers drowned Sunday in Spanaway Lake, according to the Pierce County Sheriff’s Department.

The names of the boys, ages 14 and 15, have not been publicly released.

It was about 3:40 p.m. when one of the brothers slipped off a flotation device and went underwater.

When he did not resurface, the other brother dived beneath the water to look for him.

“The brother went down there to find him but didn’t come back up,” sheriff’s spokesman Ed Troyer said.

A sheriff’s dive team was on scene within minutes and pulled one of the teens out of the water.

It took a few minutes for divers to find the second brother near the bottom of the lake.

Both boys were taken to Mary Bridge Children’s Hospital in Tacoma, where they were pronounced dead.