Four people were injured Monday, including one in critical condition, after a man in a pickup truck drove into their office building in Zimmerman, Minn., authorities said.

According to the Sherburne County Sheriff's Office, the accident occurred at 1 p.m. at the Reliant Systems building on Fremont Avenue.

The driver of the 1999 Chevy Tahoe was traveling east on Fremont when he left the road and slammed into the building, the sheriff's office said.

The four injured people were working inside the building at the time.

First responders and passersby removed the employees. Two were airlifted and two were transported by ambulance to hospitals. At least one person was critically injured.

The driver of the truck suffered minor injuries, authorities said.

The Sheriff's Office suspect alcohol was a factor. Those involved in the crash have not been identified.

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