PENDLETON, Ore. -- An Oregon man accused of causing a two-vehicle crash that killed four people on Interstate-84 over the weekend pleaded not guilty Monday to charges of manslaughter and driving under the influence of intoxicants.

The westbound pickup driven by John C. Carlgren of Carlton struck the back of a car driven by 29-year-old Jessie Cline of Hermiston, according to Oregon State Police. Cline and his three passengers died at the scene near Pendleton on Sunday.

Records show the state suspended Carlgren's license in 1991 and revoked it in 1993 because of alcohol-related arrests. His driving privileges were reinstated in 1998. He was described in court records as a habitual drunk driver and he was cited for drunk driving in 1990, 1991, and 1993. His rap sheet also showed that he assaulted a police officer in 1995 and was cited for speeding in 2005 as well as last month.

Carlgren, 46, was treated for minor injuries and transferred to the Umatilla County Jail. Bail was then set at $400,000.

Cline's passengers were identified as 29-year-old Michelle Sawyer of Lynwood Wash., 24-year-old William Johnson from Hermiston and 31-year-old Fred A. Young Junior of Boardman. They were on their way home from a church dance.