BOSTON (WHDH) - Authorities are investigating after a 69-year-old Cambridge woman was struck and killed by a cement truck while riding her bike in Boston on Friday, officials said.

Emergency crews responding to a 1:30 p.m. report of a pedestrian crash in the area of Brookline Avenue at Park Drive found Paula Sharaga suffering from life-threatening injuries, according to Massachusetts State Police.

She was later pronounced dead at Brigham and Women’s Hospital.

The driver of the Boston Sand & Gravel truck involved in the crash, identified only as a 67-year-old Salem man, was taken to Beth Israel Hospital for evaluation.

Sharaga was a beloved children’s librarian at the Brookline Public Library.

“An avid bicyclist, dedicated environmentalist, and vigorous political advocate, Paula was loved by all who knew her and will be missed terribly by the staff of the library, and by her friends in the community and around the world,” her former coworkers tweeted.

“Paula was a wonderful asset to the Coolidge Corner community, which she served for almost two decades.”

The cause of the crash remains under investigation.

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