In two separate travel advisories, the Turkish foreign ministry recommended its citizens in the United States and European countries "act calmly in the face of possible xenophobic and racist harassment and attacks" and to "stay away from areas where demonstrations may intensify."

Recent increases in "anti-Islam and racist acts" reflect the dangerous dimensions of religious intolerance and hatred in Europe, the ministry said.

Several embassies in Ankara including those of the United States, Germany, France and Italy on Friday released security alerts for their citizens in Turkey that flagged "possible retaliatory attacks by terrorists against places of worship."

This followed recent Koran-burning incidents in Europe. Sweden's foreign ministry also advised its citizens in Turkey on Saturday to avoid crowds and demonstrations.

A far-right, anti-immigrant politician burned a Koran last week near the Turkish embassy in Stockholm during a protest, heightening tensions between Turkey and Sweden. Similar Koran-burning acts in the Netherlands and Denmark also drew strong condemnation from Ankara.

(Reporting by Huseyin Hayatsever; Editing by Cynthia Osterman)