MOSCOW, June 3 (RIA Novosti) - A group of Anonymous computer hackers carried out a series of cyber-attacks on Turkish government websites early Monday in retaliation for a violent police response to anti-government protests.

Several Anonymous messages in its Twitter blog provide links to the sites, including those of Turkish President Abdullah Gul and Turkey's ruling Justice and Development Party, that have been denied public access.

Hackers normally use distributed denial of service (DDoS) attacks to knock their targets offline.

Turkey’s Hürriyet Daily News reported on Monday that some Turkish media websites have also been targeted by Anonymous for “for failing to adequately cover the events.”

The planned demolition of Gezi Park in central Istanbul sparked mass rallies in the city on Saturday, prompting police to use tear gas and water cannons to disperse the protesters. Violent clashes between protesters and police continued in Istanbul and the capital, Ankara, on Sunday.

The rally in Istanbul triggered more than 230 separate protests in 67 cities across the country, according to Sky News.

Turkey’s Interior Minister Muammer Guler said on Sunday that more than 1,700 people had been arrested in the unrest nationwide, adding that 58 civilians and 115 security officers had been injured over several days of protests.

The United States and the European Union and have already urged the Turkish government to exercise restraint, while Amnesty International has condemned the use of tear gas by Turkish police as “a breach of international human rights standards.”