A semi-truck crossed the center line, rolled onto its side and slid into a guardrail in the 12400 block of West Snoqualmie Valley Road off Northeast Novelty Hill Road at about 2 p.m. on Thursday.

Sgt. BJ Myers, media relations officer for the King County Sheriff’s Office (KCSO), said the truck hit a KCSO deputy vehicle during the incident, which took place in unincorporated King County near Redmond.

Aid and fire workers responded to the semi driver, who sustained minor injuries; the deputy wasn’t injured. Deputies on the scene investigated the accident and Myers doesn’t yet have any information on the cause of the collision. West Snoqualmie Valley Road was partly closed until about 8 p.m.

According to a witness, she was driving west up Northeast Novelty Hill Road and saw the semi (a red cab with a while trailer) weaving a bit as it came down the hill around a curve. She pulled over to the shoulder of the road, the semi passed by and she saw the accident happen while watching through her rearview mirror.