Police in Derry say they are investigating an un-notified procession in the city centre on Saturday afternoon, February 17.
Police Derry City and Strabane say: “Anyone who is organising a public procession must notify the Parades Commission.
“This notification must be given not less than 28 days before the date on which the parade is to be held.
“Such notification was not given in respect of Saturday, and an investigation is underway.”
It is the second police investigation into an unnotified parade in the city within the last week.
Police are investigating an unnotified parade over the war in Gaza on the evening of Valentine’s Day, February 14.