The bar was wrecked in the attack, and this morning there was no response from anyone working there. The bar is situated in one of the most visited squares in the centre of Rome.
More top news
Desmond Sylva will appear in court on Friday.
The arrest came during an ongoing investigation into criminality linked to the East Belfast UVF.
If the permits to extract more water are used before the end of September, United Utilities will be required to introduce a hosepipe ban.