Two pilots are dead after a mid-air collision between two planes in Nevada on Sunday, federal officials said, according to local reports. The planes involved were a single-engine Cessna 170 and an unidentified experimental aircraft.

The crash occurred in Yerington, in western Nevada, about 60 miles southeast of Reno. Neither pilot had been identified and there was no one else in the planes except the pilots, Ian Gregor, spokesperson for the Federal Aviation Administration, or FAA, reportedly said. According to sheriff Sgt. Ryan Powell, several planes were flying in the area through the weekend, the Reno Gazette-Journal reported.

"Deputies met with witnesses on scene who stated that two airplanes collided north of the dry lake bed and crashed into the side of a hill," Powell said in a statement, according to the Reno Gazette-Journal.

The Cessna was a four-seater plane and, according to authorities, an investigation into the case will continue to ascertain the reason behind the crash.