Rioting Germans were pelleting police with stones, bottles and firecrackers on Labor Day as authorities used pepper spays and water cannons against them.

Berlin and Hamburg were the scenes of massive demonstrations on Wednesday. In the capital, around 9,000 people, some of them masked, marched the streets as some 7,000 officers were on stand-by.

As night approached, several incidents of violence occurred. Protesters threw stones and bottles and police and emergency vehicles, damaged a bank office and several parked cars. At least one person was arrested.

In Hamburg, the protesting crowd numbered about 1,400 participants closely monitored by a cordon of 1,600 police officers. The traditionally passionate rally escalated into violence. Several officers were injured as they used water guns, pepper sprays and batons against rioting troublemakers. At least eight of those were arrested.

Despite the incidents, a police spokesman said the service was satisfied with how the demonstrations were handled, saying the violence was less severe than in previous years. German police took the strategy to deescalate pressure on radical protesters on Labor Day.

Policemen and policewomen stand on a street during the 'Revolutionary' May Day demonstration on May 1, 2013 in Berlin. (AFP Photo / John Mcdougall)

Supporters of Germany's right extremist National Democratic Party (NPD) wave flags as they take part in a neonazi demonstration on May 1, 2013 in Berlin. (AFP Photo / John Mcdougall)

Police officers use a crane to remove anti-nuclear protesters sitting on a platform around a block of concrete symbolising Gorleben nuclear waste repository, during May Day protests in Berlin, May 1, 2013. (Reuters / Tobias Schwarz)

Demonstrators break windows of a savings bank during May Day protests in Berlin, May 1, 2013. (Reuters / Pawel Kopczynski)

German riot police carry a left-wing protestor from the railway tracks as protestors block the tracks during a demonstration against a right-wing rally in Frankfurt, May 1, 2013. (Reuters / Kai Pfaffenbach)

German riot police stop left-wing protestors on the railway tracks during a demonstration against a right-wing rally in Frankfurt, May 1, 2013. (Reuters / Kai Pfaffenbach)

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