Around 300 loyalists held a flag protest on Derry’s Peace bridge yesterday.
Police say the protest - sparked by Belfast City Council’s decision taken last week to fly the Union flag only on designated days - passed without incident.
But they say a file will be sent to the Public Prosecution service about the actions of some protestors.
“Between 250 – 300 people gathered on the Peace Bridge for a short time after walking there from the Fountain Estate and Bond Street areas,” a PSNI spokeswoman says.
“They carried out a short protest on the Peace Bridge. At approximately 3.50 pm the crowds then dispersed.
“Police have carried out evidence gathering in relation to the actions of some of these protestors and a file will be prepared for the PPS.”
The Progressive Unionist Party’s Nigel Gardiner says further protests in the city could not be ruled out.