Police in Derry appeared to pull back after coming under attack as an un-notified republican parade made its way through the Creggan area.
This followed warnings from Assistant Chief Constable Bobby Singleton and other senior PSNI officers that intelligence indicated dissident republicans would attempt to use "public disorder" in the area as a "platform to launch terrorist attacks" against officers.
While a helicopter flew overhead during the event there was little other visible sign of police presence in the area beyond a number of police vehicles.
Read more: PSNI braced for 'public disorder' to 'launch terrorist attacks' on Easter Monday
The parade itself, which had not been notified to the Parades Commission despite several appeals from the PSNI, consisted of around a dozen people in paramilitary style uniform carrying tricolours and other flags.
As the group marched from Central Drive, a police Landrover was spotted by masked youths in the crowd at the junction between Lisfort Drive and the Iniscairn Road.
Several youths ran ahead and bombarded the vehicle with petrol bombs and other projectiles, before the Landrover exited the area in flames.
As the parade caught up with the crowd moving ahead of it, more police vehicles were spotted in the direction of Blighs Lane and came under attack.
A police Landrover was struck and several projectiles were thrown in the direction of a police car, amid shouts of 'get the car' from some in the crowd, but both vehicles appeared to avoid further attack by swiftly withdrawing.
Once at the city cemetery, a commemorative event was held, including the playing of the Irish national anthem, the lowering of flags, and several speeches.
Speakers hit out at "so-called mainstream republicans" and criticised the Good Friday Agreement as a "stepping stone to nowhere".
One speaker described the event as “respectful and dignified, paying homage to the revolutionary heroes of 1916 and all the republican dead”.
Once proceedings were concluded, some of those in the crowd gathered in a tight group within the cemetery walls as the gates were closed.
Umbrellas were used to block the view of media as some of those present appeared to burn clothes.
Shortly afterwards, there were cheers as the cemetery gates were re-opened.
Several masked youths carried petrol bombs and iron bars but with little visible police presence and no obvious target, the crowd appeared to have mostly dissipated by around 3.30pm.
Debris, including wheelie bins, was later strewn across the road at the roundabout at the top of Eastway.
A police spokesperson said: "Our officers have come under attack in Creggan, with petrol bombs and other objects thrown at their vehicle while in attendance at an unnotified Easter parade.
“No injuries have been reported at this time. We would appeal for calm.”
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