Oklahoma Highway Patrol officials said a Sherman man was arrested for drunk driving Monday after causing a four-vehicle crash atop the Denison Dam and injuring two people.

OHP Lt. Scott Hampton said the crash occurred at approximately 4 p.m. on the Oklahoma side of State Highway 91, after a trailer became detached from a pickup and the driver stopped in the middle of the two-lane roadway. Hampton said two other vehicles — their direction of travel unclear — arrived at the scene and came to a safe stop, but were then struck by the suspected drunk driver of another pickup.

“As those three vehicles were sitting there, waiting, (the DWI suspect) came up from behind in a 2011 Dodge Ram and hit the very rear vehicle, causing a chain-reaction crash that forced the vehicles into one another,” Hampton said Tuesday.

Two people were injured in the crash and transported to Texoma Medical Center by ambulance, but Hampton said he did not have information regarding the severity of their injuries on Tuesday. The suspect was charged with driving while intoxicated and booked into the Bryan County Jail. Hampton said a Durant woman involved in the crash was also arrested after officers determined she was driving with a suspended license.

The Grayson County Sheriff’s Office and U.S. Army Corps of Engineers also responded to the crash and closed both lanes of traffic on the bridge as OHP investigators worked the scene and emergency crews cleared the wreckage.

Hampton urged all motorists to refrain from drinking and driving and to properly secure all loads.

“When pulling a trailer or anything attached to a ball (hitch), always double check the connection, make sure the safety chains are properly secured and make sure the lighting system is in good working condition,” Hampton said. “And in the event of roadway obstruction, like this, we recommend that everyone hit their hazard lights and pull as far off the roadway as you safely can.”

Drew Smith is the crime and emergency reporter for the Herald Democrat. Contact him at asmith@heralddemocrat.com or on Twitter @DrewSmithHD.