A multiple-vehicle accident temporarily caused detours on Highway 377 south, between 3M and Kohler, Monday afternoon. The wreck was reported at 3:28 pm.  Two Lifeguard ambulances were on scene and medical aid was being rendered to victims who were in the grass on the side of the highway.  Brownwood PD, Fire and Brown County Sheriff’s Department responded.  Southbound traffic was allowed to pass the scene on the shoulder of the road.  Both lanes of northbound traffic was blocked and traffic coming from the south was detoured onto FM 45 east.  By 4:00 pm, all lanes of traffic were reopened.  It is unknown the number of injuries.