A woman in her 20s has been shot in the legs in what police called a “targeted” attack.
The Merseyside force said the woman was shot at about 00:55 GMT at an address in Lime Grove, Toxteth, Liverpool.
It said armed officers attended the scene and the investigation was in the “critical early stages”.
Det Insp Ainsley McAlice said: “We understand the concern that any such incident will have in our communities, and initially believe that this was a targeted attack by someone known to the victim.”