SILVER CREEK, NY (WNY News Now) – A man was struck by an 18-wheel tractor trailer on Interstate-90 in Chautauqua County on Thursday.

Image by Jackson Hickey / WNY News Now.

According to fire dispatch, the accident happened around 3:15 p.m. in the westbound lane of I-90 near mile marker 457.8 between Hanover and Allegany Roads.

The person, who was reported to be unconscious but breathing, possibly suffered a head injury, officials said.

A medical helicopter was called to the scene with crews shutting down the highway around 3:30 p.m. in order to create a landing zone for the chopper.

Around 3:50 p.m. the victim was medevacked to ECMC Hospital in Buffalo.

Traffic, dispatch reports, will be diverted at the Silver Creek exit.

This is a developing story and will be updated when more information is available.