The PSNI is investigating after shots were fired in Lisburn early on Tuesday morning.
The incident happened in Lawnbrook Drive between 3am and 4am.
There were no reports of any injuries.
Detective Inspector Dan Kelly said: "We are currently conducting enquiries in the area, and would appeal to anyone who saw or heard anything suspicious in the Lawnbrook Drive area, between 3am and 4am today, to call detectives in Lisburn on 101, quoting reference number 539 of 04/02/20.
"There are no further details at this time.
"Information can also be provided to the independent charity Crimestoppers on 0800 555 111, which is 100% anonymous and gives people the power to speak up and stop crime."
