Up to 3,000 people have attended a march in Derry to mark the 41st anniversary of Bloody Sunday, when 14 civilians were killed after British army paratroopers opened fired on a civil rights demonstration in the Bogside area.

At Free Derry Corner the crowds were addressed by Bernadette McAliskey, who had been the main speaker at the Bloody Sunday rally in 1972.

This was the first commemoration in Derry since the PSNI confirmed last month that it is opening what it says will be a lengthy and complex investigation into the events of 1972.

That decision by the police followed the Saville Public Inquiry into Bloody Sunday and after an apology was given to the victims and their families by British Prime Minister David Cameron in the House of Commons.

Earlier, on the other side of Derry city, several hundred people attended a loyalist protest linked to the ongoing Union flag controversy.

This weekend also marks the 8th anniversary of the killing of Robert McCartney.

He was an innocent man who was attacked when attempting to intervene in a row in a Belfast bar.

The clientele there include a group who had earlier attended a Bloody Sunday commemoration in Derry.

Nobody has ever been brought to justice for Mr McCartney's murder.