PITTSBURG -- A man struck and killed after colliding with a four-door sedan while riding his bike last week was identified Wednesday by the Contra Costa County Coroner's Office as 50-year-old Shawn Lumen of Pittsburg.

Lumen was riding northbound in the southbound lanes on Loveridge Road around 4:45 a.m. on March 12 when he ran head-on into the sedan near Leland Road. Police said he was on his way to work. He died the next day, authorities said.

The driver stopped and cooperated with police, and an investigation showed that no drugs or alcohol were involved.

Contact Rick Hurd at 925-945-4789 and follow him at Twitter.com/3rdERH.