Lincolnshire Police are appealing for witnesses and information after two incidents of disorder broke out in St Giles in Lincoln on Thursday night and in the early hours of Friday.
The first incident happened at around 10pm in Swift Gardens on Thursday, February 12, then another at around 3am on Friday morning.
Nobody was seriously hurt in the incidents, police say.
Investigating officers are working to establish the exact circumstances involved and would like to hear from anyone who may have any information relating to the incidents.
If you were in the area at the time of the incident and have any information that you think might be relevant, contact Lincolnshire Police on the non-emergency number 101 quoting incident 24 of 13/02/2015 or 444 of 12/02/15.