Napa police report that four traffic collisions occurred southbound on the Butler Bridge between the hours of 6:35 a.m. and 7:4 a.m. Sunday.
According to today's police log, other collisions occurred in multiple areas including the First Street overpass at Highway 29.
None of Sunday's crashes involved injury, according to the log.
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"Please drive slowly and safely when there is ice on the road," the police log advises.
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