Three people were transported to the hospital and one man was seriously injured in two separate rollover accidents on the highway south of Coupeville Thursday evening.

The Washington State Patrol reported that Freeland resident Michael Breiling, 25, was northbound in a 2002 Ford F350 on State Highway 525 and drifted over the centerline near the intersection with Houston Road.

Breiling’s truck struck a guardrail, rolled off the roadway and struck a tree.

Breiling was seriously injured and airlifted to Harborview Medical Center in Seattle. He was in serious condition in the intensive care unit Friday.

The State Patrol reports that drugs or alcohol may have been a factor in the crash.

A few hours earlier, a southbound Brushworks NW van crashed near the intersection of State Highway 525 and Race Road.

The driver said he dozed off and didn’t make the curve in the road, according to the trooper at the scene.

The van struck a tree and rolled on its side. Ladders were scattered throughout the wooded area.

The driver and a passenger didn’t appear to be injured but were transported to Whidbey General Hospital as a precaution, according to the trooper.