A number of disturbances have taken place in Londonderry following the Apprentice Boys parade.
10,000 Apprentice Boys and 120 bands marched in Londonderry
Verbal taunts were exchanged between nationalists and loyalists and several bottles were thrown in the Diamond area of the city.
Police, who forced a group of nationalist protesters away from the area, said the incident was "minor".
A number of fireworks and stones were also thrown towards the Diamond by nationalist youths.
Earlier on Saturday, Superintendent Johnny McCarroll said the march, which commemorates the 1689 Siege of Derry, was the most successful parade in 15 years.
An estimated 15,000 Apprentice Boys and 120 bands took part in the main demonstration.
Police said eight people in total had been arrested during the day, including two for disorderly behaviour and two for drunkenness.
Superintendent McCarroll also said that seven bands would be reported to the Apprentice Boys organisation for misbehaviour.
He said the seven bands had behaved in a "deliberately provocative manner".
Rival groups of loyalists and nationalists exchanged taunts during the parade.
Police praised the Apprentice Boys, the Bogside Residents' Group and Chamber of Commerce.
"It was very successful - I think it was one of the most peaceful parades that I have seen in 15 years of policing," said Supt McCarroll.
"I am very pleased and I am very pleased for the city."
Earlier, police in Society Street were attacked with petrol bombs. It happened as an Apprentice Boys bannerette was being dedicated. No-one was injured.
The parade is Northern Ireland's biggest annual loyal order parade.
The main demonstration, which lasted for several hours, was preceded by a religious service and a pageant re-enacting the siege.
The parade has been relatively trouble free in recent years.
The loyal order commemorates the 13 apprentice boys who shut Derry's gates at the start of the siege by the troops of the Catholic King James II in December 1688.
The siege was finally lifted in the summer of 1689.