A man has been arrested in Belfast on suspicion of attempted murder after gunshots were fired after clashes between loyalist and nationalist protesters.
The Police Service of Northern Ireland (PSNI) confirmed the arrest of the 38-year-old man.
He was held after a number of shots were fired in east Belfast.
Officers had earlier used water cannon amid disturbances in the Lower Newtownards Road area of the city.
The violence followed a march by loyalists who had been demonstrating against restrictions on the flying of the Union flag over City Hall.
Sky News Ireland Correspondent David Blevins said the loyalists apparently came under attack as they passed a nationalist area, following a peaceful march.
It is the third day of clashes between opposing sides in various parts of Belfast.
"There is the potential for the violence to intensify," Blevins said.
"And the gunshots from with the loyalist area is a very worrying development.
"The clashes between police and loyalists came after the officers were accused of brutality after the march."
Today's disturbances follow running battles overnight which saw petrol bombs, fireworks and ball bearings thrown at officers in riot gear, injuring nine of them.
The officers were injured from elements within a crowd of up to 300 people, in what they called "a sustained attack".
A PSNI spokesman said 18 arrests were made after the public disorder in the Castlereagh Street and Templemore Avenue areas.
Some 30 petrol bombs were thrown at police officers as they dealt with riots on Friday night.
There were also protests in the Robbs Road area of Dundonald, near Ulster Hospital, and in the O'Neill Road area of Newtonabbey, where there was reportedly an attempt to hijack a bus, plus a raid on a commercial premises by masked men.
The latest violence comes after 10 police officers were injured on Thursday during a demonstration against the decision to reduce the number of days the Union flag is flown from City Hall.
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