FALMOUTH, MASS. (WHDH) - Authorities are investigating a crash between a truck and a car in Falmouth that left a 4-year-old with life-threatening injuries.

Officers responding to a reported two-vehicle crash on Route 151 northbound around 9 a.m. Thursday found a sedan and a flatbed delivery truck that had been involved in a crash, according to Falmouth police.

A 4-year-old passenger from the sedan was taken by helicopter to a Boston-area hospital with life-threatening injuries, Falmouth Fire/Rescue said.

The driver of the sedan, a 28-year-old woman, suffered non-life-threatening injuries.

The truck driver refused medical treatment.

The cause of the crash remains under investigation.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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