It happened in Dunlin Close last night .
Two men, aged 33 and 27, attended hospital with injuries not thought to be life threatening or changing.
West Midlands Police is urging anyone with any information about what happened to get in touch as soon as possible.
Detective Inspector Mo Yousaf, from force CID, said: “We believe the incident took place at around 11.30pm around Dunlin Close Erdington last night.
"I’d encourage anyone who knows anything to get in touch.
“We’re doing all we can to understand what has happened, why and who was responsible.
“Officers will be in the area to offer reassurance to the local community.”
Anyone with information can contact police via live chat on their website or call 101, quoting log number 5052 of May 7.