An 18-year-old man was flown to a Boston hospital with life-threatening injuries after crashing into the back of a tractor trailer on Interstate 93 in Andover late Sunday night.

Massachusetts State Police have not released the Methuen teen’s name. Police closed both sides of the highway for several hours to allow the MedFlight helicopter to land. The north side, where the crash occurred, was not reopened until 1 a.m.

The crash happened just before 10 p.m. Massachusetts State Police believe the man was speeding when he crashed, based on an initial investigation.