A 49-year-old bicyclist was critically injured in a crash in St. Paul on Thursday, police said.

Officers sent to the scene about 4:50 p.m. found Patrick John Koenig, of St. Paul, lying on his back in the middle of Prior Avenue, near St. Anthony Avenue. His bicycle was nearby, as was a sedan and its driver.

Paramedics took Koenig to Regions Hospital. Officers were told he sustained a head injury and was admitted to the intensive care unit, said Steve Linders, a St. Paul police spokesman.

The 25-year-old driver told police that he was heading north on Prior Avenue when a bicyclist suddenly struck his vehicle’s passenger side, Linders said. The driver said he had not seen the bicyclist before the collision, but he believed the man was trying to turn from St. Anthony Avenue onto Prior.

Officers did not detect any signs of impairment from the driver and continue to investigate what happened, Linders said. There were no witnesses to the crash.