ALBION — A 93-year-old woman died after a head-on, two-car collision on Main Street Monday afternoon.

Elsie McDonald, of Albion, suffered internal injuries and died at the scene, said Kennebec County Sheriff Randall Liberty.

McDonald was the passenger in a Mazda driven by her granddaughter Eliza Henderson, 47, of Albion, who was uninjured.

Henderson was driving north on Main Street about 3 p.m. when a Chrysler minivan traveling southbound drifted into the opposite lane and hit the Mazda head on, Liberty said.

He said a “chemical analysis” showed the driver of the minivan, 28-year-old Heather Truman of Albion, was impaired. A blood test would indicate the level of her impairment and whether she was under the influence of drugs or alcohol. The results would probably be available in three days, Liberty said.

He said Truman was “incoherent” and couldn’t explain why she drifted into oncoming traffic. He said she was taken to Inland Hospital in Waterville. He expected her to be released later Monday.

Also in the minivan were passengers Alva Donnell, 33, of Albion and his 1-year-old son. Neither of them were injured in the accident.