Indianapolis police are investigating four shootings that occurred between 11 p.m. Thursday and 3 a.m. Friday, injuring five people. Two people were shot near 42nd Street and Sheridan Avenue in the first incident. Another was shot near 37th Street and Hillside Avenue. The third shooting left a man in critical condition near 31st and Hovey Street. A man suffered a gunshot wound to the leg in the fourth incident on West 27th Street. No arrests have been made.