BOSTON (CBS) – The man behind the wheel of the tour bus that slammed into an overpass in Boston Saturday night may have been distracted.

WBZ NewsRadio 1030′s Karen Twomey reports

Investigators are looking into whether 66-year-old Samuel Jackson may have been checking his GPS when he missed a warning sign and slammed the bus into the Western Avenue bridge on Soldiers Field Road in Brighton.

According to CBS Philadelphia, Ray Talmedge, owner of the Philadelphia-based Calvary Coach Bus company, said Jackson looked down at his GPS and saw the bridge too late.

WBZ NewsRadio 1030′s Kim Tunnicliffe reports

Massachusetts State Police would not comment on the report Monday. No charges have been filed against Jackson at this point in the investigation.

The Calvary Coach bus had just left Harvard and was heading back to the Philadelphia area Saturday night when it crashed.

Thirty-five people were hurt, including 17-year-old Matt Cruz, who is still in critical condition at Boston Medical Center.

Related: No Plans To Raise Bridge Heights

There is a ten-foot height limit on Soldiers Field Road. Buses and other commercial vehicles aren’t supposed to be there.

State Police say a preliminary report on the crash from their collision construction team will come in the next six weeks.