LONDONDERRY -- A 19-year-old man was transported to a Boston hospital following a rush-hour collision on the Interstate 93 Exit 4 overpass Wednesday evening.

Shortly after 5 p.m., local emergency crews responded to reports of a three-vehicle crash on Route 102, on the I-93 overpass.

Police closed a section of the roadway as first responders used hydraulic tools to remove the unidentified victim, who was trapped inside one of the vehicles when it rolled over.

The man, whose name wasn't immediately available, sustained a serious head injury and was transported by ambulance to Parkland Medical Center in Derry, where a DHART helicopter awaited to transport him to Boston, Londonderry fire officials confirmed.

By 6 p.m. traffic was moving slowly over the highway, with one lane reopened as firefighters worked to clear the roadway of debris.