Two sisters injured in a Navi Mumbai home shooting; one arrested, motive under investigation as a suspect remains at large. A 21-year-old man was arrested after allegedly shooting his former girlfriend and injuring her elder sister in Koparkhairane, Navi Mumbai, following her refusal to resume their relationship.. The Koparkhairane police have yet to recover the firearm in the incident involving a 21-year-old man who was arrested for firing three rounds at his.