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A 35-year-old man was struck and killed by an Alameda-Contra Costa Transit District bus after being knocked from his bike into traffic on a busy Oakland street this afternoon, police said. 

The accident happened at about 4:35 p.m. on MacArthur Boulevard near Patterson Avenue. Police spokesman Officer Jeff Thomason said officers discovered the man was riding his bike when a 42-year-old Manteca woman opened her car door, knocking the bicyclist into traffic. 

The bicyclist was then struck by a Line NX bus and was taken to a local hospital, where he was pronounced dead.  

AC Transit spokesman Clarence Johnson said the bicyclist and bus were both traveling along MacArthur Boulevard, approaching Patterson Avenue, when the accident happened.. 

There was no report of injuries to any passengers on the bus, which was taken out of service. 

Johnson said traffic was diverted around the intersection of MacArthur Boulevard and Patterson Avenue, but that the collision did not affected AC-Transit service otherwise. 

Thomason said officers remained in the area at 7:20 p.m., investigating the crash. Alcohol does not appear to be a factor in the accident.