Gardaí are questioning a 30-year-old man in connection with a firework attack on gardaí at a protest in Dublin on Saturday afternoon.

The man was arrested this morning and is being detained at Irishtown Garda Station in the south of the city.

He can be questioned for up to three days.

A criminal investigation was set up after the violence in Dublin city centre last Saturday, during which bottles, liquids and other missiles were thrown at gardaí.

So far, 20 people have been charged, 13 of whom have already been brought before the courts.

Three juveniles have also been released to be considered for inclusion in the Juvenile Diversion programme.

Gardaí had also been searching for a man following an incident were a firework was fired at gardaí on Grafton Street.

The firework used can shoot up to eight missiles and footage of the incident was widely shared on social media.

A house in south Dublin was searched yesterday as part of the criminal investigation and items including fireworks were removed.

Fireworks are illegal under explosives legislation.

The 30-year-old man was arrested in connection with the attack shortly after he arrived at Irishtown Garda Station with his solicitor.

He is being detained under Section 30 of the Offences Against the State Act on suspicion of committing a scheduled offence and can be questioned for up to three days.

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Scheduled offences and Section 30 are more usually associated with serious or terrorist related crime and while that does not appear to apply in this case, gardaí say they are investigating a serious offence linked with an explosive device.

The wider investigation into the violence in Dublin on Saturday is also continuing.

Gardaí are examining CCTV and social media footage of the event.

They have identified several more people who were at the event, including the person suspected of lighting the firework that was fired at gardaí.

Further arrests are expected over the next few days.

Several people who were in Dublin city centre over the weekend for non-essential purposes were also fined for breaching Covid-19 restrictions.