“Kevin Hart is on the mend this morning after going under the knife Sunday … less than 24 hours after he injured his back in that horrific car accident,” reports TMZ.

The story continues, “A source connected to Kevin tells us doctors completed successful back surgery on Kevin Sunday evening. Another source told us the comedian is expected to remain in the hospital for at least a couple of days while he recovers.”

According to an earlier report, TMZ said, “The accident happened just before 1 AM Sunday on the winding and treacherous Mulholland Highway [in Los Angeles]. Crash scene video, obtained by TMZ, shows Kevin’s Plymouth Barracuda deep in a gully about 10 feet off the road.

“The car smashed through wooden fencing along the roadside, and you can see the roof was completely crushed by the impact.”

TMZ added, “Cops have confirmed the vehicle belongs to Kevin, but they tell us he was not driving at the time of the accident. There were 2 other people were in the car, including the driver — and cops say Kevin and the driver both suffered  ‘major back injuries.”

The TMZ stories, linked in this item, have pictures from the accident scene.