New Hampshire State Police are investigating a deadly crash Saturday on I-93 in Grafton County. 

The driver, 56-year-old Richard Rosa of Lowell, Massachusetts, was traveling north just before 1 p.m. when a rear tire of his 1996 Ford Escape malfunctioned. According to New Hampshire State Police, Rosa veered off the road, crashed into median trees and was thrown from his SUV.  

He was transported to Speare Memorial Hospital, where he died. The passenger, 24-year-old Marianne Rosa was airlifted to Dartmouth-Hitchcock Medical Center. She is being treated for what police say are life-threatening injuries. 

I-93 was closed and traffic was diverted for more than an hour while the crash was investigated. Anyone with information about the crash is asked to contact New Hampshire State Police.