Police said four people were killed and one person was injured after a man opened fire on the Fox Cities Trestle Trail Bridge in Menasha, Wisconsin, on Sunday night. The shooter was among those killed and was pronounced dead at a local hospital, Menasha Police Chief Tim Styke said. One person was in critical condition. Police declined to identify any of the victims, pending notification of relatives. Witnesses told The Appleton Post-Crescent they heard 10 to 12 shots fired from the bridge. Police were interviewing witnesses and are expected to release more information at a press conference Monday.