Lawrence police are investigating an alleged aggravated robbery and battery of three victims that occurred 3:30 a.m. Monday at The Reserve apartments, 2511 W. 31st St., in which a suspect stole a black Kansas University hooded sweatshirt and a purple and white Los Angeles Kings hat. The victims are a 20-year-old Lawrence man, two Lenexa men ages, 18 and 20, and a 21-year-old Kansas City, Kan., man. Minor injuries were reported, and the suspects are suspected of using alcohol.