PORTLAND, Ore. (KOIN) One person is dead and two remain missing after six people went over a waterfall in Oregon, authorities said.

The group went over Dillon Falls on the Deschutes River, just outside of Bend, on Saturday.

The emergency response began around 3 p.m. with responders from the sheriff’s office, Search and Rescue, Bend Fire & Rescue, a drone from Bend police, and help with an aerial search from Airlink, authorities said in a release.

One person died at the scene. Three were rescued and rushed by ambulance to St. Charles-Bend, but two others remain missing as of Sunday.

Further details including the victims’ identities and how the group got swept over the falls were not immediately released.

Dillon Falls, which is within Deschutes National Forest, features a large drop followed by a series of rapids that surge through a narrow gorge of lava rock.

The Associated Press contributed to this report.