Gardaí have begun a criminal investigation after shots were fired during the funeral of dissident republican Alan Ryan in Donaghmede on Saturday.

Shots were fired into the air as Mr Ryan's coffin was being removed from his home at Grange Abbey Drive.

The paramilitary-style funeral was also escorted by masked men and women in black berets and military clothes.

Minister for Justice Alan Shatter described some of the events at the funeral as reprehensible and absolutely unacceptable.

A major security operation was put in place and roads were closed as masked men and women in military-style clothes and black berets led the funeral cortege.

Senior figures in the dissident republican organisations also attended.

There was a large garda presence at the funeral.

Mr Shatter said: "I recognise fully the immediate difficulties which face An Garda Síochána when people take advantage of a funeral to behave in this fashion.

"But the Garda Commissioner has assured me that they are pursuing rigorously any breaches of the law which took place.

"The gardai, together with their colleagues in the North, will continue to take every action open to them to deal with the activities of members of these groups, whether they are engaging in terrorism or organised crime."