Officers found a number casings after reports gunshots were heard in Worcester Road, Bootle, Merseyside at about 21:30 BST on Friday.
No-one was injured and an investigation is under way.
Merseyside Police has secured an order so residents in Bootle and Litherland can be searched for offensive weapons between 17:00 and 02:00 on Sunday.
The Section 60 Order under the Criminal Justice and Public Order Act 1994 was authorised by a senior police officer.
Ch Insp Paul Court said: "The behaviour of those involved is despicable and has a direct impact on our community.
"Our aim is to deter people from committing crimes, to identify those who are likely to offend and prevent them from doing so."
People will be searched for offensive weapons by police after shots were fired and casings found in a street.