WESTFORD, Mass. (AP) -- Authorities said an 87-year-old Westford man involved in a crash with a town police cruiser last week has died.

The Middlesex district attorney's office confirmed that Thomas Courtney died Monday.

Courtney was the passenger in a pickup truck that was struck by the cruiser in front of the Nabnasset Lake Country Club at about 4:45 p.m. on Aug. 29.

The officer, who was not injured, was responding to a call. The cruiser's flashing emergency lights were on, but its siren was not.

The truck driver's name has not been made public.

A spokeswoman for the district attorney's office told The Sun of Lowell the accident remains under investigation.