While a 6-year-old boy heals from injuries he suffered this week in a hit-and-run wreck in North Charleston, authorities continue to search for the unknown driver responsible.

S.C. Highway Patrol Sgt. Bob Beres said the department is following up on several tips, but a suspect had not been identified Friday afternoon.

William Smith, a Windsor Hill Elementary student, had been upgraded Friday to fair condition, Medical University Hospital officials reported.

He was admitted to the hospital in serious condition on Wednesday after being struck a little before 7 a.m. at Windsor Hill Boulevard and Aspen Woods Lane in Dorchester County. Beres provided the name of the injured boy Friday, and said the information should have been released a day earlier. A collision report also was released following a supervisor’s approval.

The report was not fully complete because the department’s investigation was still underway, Department of Public Safety officials said.

But the Highway Patrol does not withhold reports until the department concludes investigations, as an agency spokeswoman had indicated the previous day. They said that statement was the result of some miscommunication.

The S.C. Highway Patrol on Thursday released a flier asking for the public’s help in tracking down the driver who struck the boy and fled from the scene. Witnesses described the suspect vehicle as a gray or silver-colored minivan, or possibly a crossover-type SUV, the Highway Patrol reported. The extent of the damage is unknown.