The PSNI says it's reviewing footage of youths throwing petrol bombs during Easter Monday parades in Derry under the Terrorism Act.
The city's chief of police has also appealed for calm after the scenes of violence against PSNI during a dissident parade, organised by the Derry 1916 Commemoration Committee, earlier today.
A number of missiles were hurled by young people at a PSNI landrover monitoring the parade in the Creggan area of the city.
