Two Las Vegas police officers were in "very critical" condition this morning after their vehicle rolled over at an east valley intersection.
Sheriff Doug Gillespie said the two male officers were fighting for their lives at the hospital.
"Right now, a lot of prayers are needed," Gillespie said.
Investigators were still piecing together what happened in the moments leading up to the 9 p.m. crash Wednesday near the intersection of Washington Avenue and Nellis Boulevard.
Gillespie said it was unclear whether the officers were en route to a call.
Police restricted access to the accident scene, where the mangled police cruiser was resting on its roof in the right northbound lane of Nellis, just north of Washington.
The passenger side doors had been ripped off by emergency responders to rescue the two officers trapped inside.
In the minutes after the crash, police in marked and unmarked cars blocked off the intersections on Washington as their colleagues escorted screaming ambulances to University Medical Center.
Dozens of officers waited anxiously outside UMC's Trauma Unit, as they have done before for colleagues injured in the line of duty.
The crash is the latest in a series of police-involved collisions that have occurred since May 7 when Las Vegas officer James Manor died while responding to a domestic violence call.
Manor was traveling at high speed without flashing lights and siren and hit a pickup that had pulled in front of him on Flamingo Road near Rainbow Boulevard.
In late June, a Las Vegas officer suffered nonlife-threatening injuries after crashing into another vehicle near Decatur Boulevard and Vegas Drive.
In July, an on-duty Las Vegas police officer suffered moderate injuries after being involved in a three-car collision.
The officer was northbound on Lamb Boulevard near Owens Avenue when his patrol car was struck by a driver attempting a left turn.
Contact reporter Lawrence Mower at firstname.lastname@example.org or 702-383-0440.