A 51-year-old Fitchburg man was killed when a tractor-trailer collided with his car in traffic on Route 2 East today in Leominster, State Police said.

The crash occurred around 10:35 a.m. The Leominster Fire Department and EMS were called to the scene to aid the man.

Authorities withheld the identity of the victim until family members could be contacted.

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One travel lane was closed for two hours while authorities investigated the incident, State Police said. Traffic on Route 2 was not significantly impacted by the lane closure, State Police said.

The cause of the crash is still under investigation by State Police and multiple other agencies.