OSHKOSH, WI (WTAQ)-Oshkosh police are investigating three separate incidents from Tuesday night that may be connected. The first incident happened at about 8:45 p.m. at Motherhood Maternity.  Police say two masked individuals entered the store, walked around, and then left.  Not long after that, two people went into Supreme Lingerie and attempted a robbery.  One suspect showed a gun.  The 3rd incident involved robbing a pizza driver.  Similar suspect descriptions in all 3 incidents.