West Midlands Police said armed officers partially closed Lewis Street, in Birchills, on November 17 shortly before 8.30pm after being called out. No-one was hurt and no damage was reported.
In a statement the force said: "We’re in the early stages of the investigation and currently looking at CCTV but we believe two cars may have been involved. We believe this is a targeted attack and will be increasing patrols to offer reassurance."
Witnesses or anyone with information should phone 101 or visit the force website quoting crime number 20/964840/22.