Capt. John Greland at C-6 reports that around 5:55 p.m. on Tuesday, a motorist took exception, by way of his fist, to a bicyclist obeying traffic rules at Dorchester Avenue and Columbia Road.

Greland says the motorist, apparently headed straight, beeped at the bicyclist in front of him. When the bicyclist refused to move and told him the light was red, the driver got out of his car and punched the bicyclist in the face, giving him a bloody mouth and knocking him to the ground - possibly into unconsciousness - Greland says.

EMTs took the bicyclist to the hospital; police will seek criminal complaints against the driver in South Boston District Court.