Turkish Prime Minister Recep Tayyip Erdogan on Thursday cast doubt on a proposal to secure Syria's chemical weapons, saying the Syrian government should not be trusted and is only seeking to stave off an international intervention.

Erdogan said that Damascus has "violated all of its promises in order to buy more time to continue massacring people, and it will continue to do so."

Police used water canon and tear gas overnight Wednesday in a bid to break up fresh anti-government protests across Turkey, media said.

Thousands of people angry over the death of a 22-year-old demonstrator in southern Turkey on Monday clashed with police in Istanbul, the capital Ankara, the western city of Izmir as well as in the southern cities of Mersin and Atakya.

Turkey's Interior Minister Muammer Guler said Wednesday that protesters were attempting to use the death of a young man during a demonstration to "spread chaos" as pockets of anti-government unrest flared once again in the country.

As tensions rose, the country's Kurdish rebels for the first time called on their supporters to join demos against Prime Minister Recep Tayyip Erdogan, seen by critics as increasingly authoritarian.

Turkish Prime Minister Recep Tayyip Erdogan on Saturday criticized Washington for its response to his claims of Israel's involvement in the Egypt crisis.

The Turkish leader on Tuesday accused the Jewish state of being behind the military-backed ouster of Islamist president Mohammed Morsi last month.

The White House on Tuesday condemned Turkish Prime Minister Recep Tayyip Erdogan's claim that Israel had a role in toppling ousted Egyptian president Mohammed Morsi.

White House spokesman Josh Earnest said the comments were "offensive and unsubstantiated and wrong."

Turkish Prime Minister Recep Tayyip Erdogan accused Israel on Tuesday of being behind the military-backed ouster of Egypt's Islamist president Mohammed Morsi last month.

"What do they say about Egypt: democracy is not the ballot box. Who is behind this? It's Israel," Erdogan, an outspoken critic of the Jewish state, told a meeting of his Islamic-rooted Justice and Development Party (AKP).

Turkey's prime minister lashed out Saturday at the international response to the escalating crisis in Egypt, saying organizations including the U.N. and EU should be ashamed of their "inaction."

"Let me say very clearly, the United Nations Security Council no longer has the right to look at itself in the mirror, it's so ashamed, because it couldn't condemn what's happening in Egypt," said Prime Minister Recep Tayyip Erdogan.

Turkey's prime minister has accused the banned Kurdistan Workers' Party (PKK) of failing to withdraw its fighters from Turkey as agreed under a peace process, press reports said Saturday.

The PKK agreed this year to withdraw its estimated 2,000 fighters to their bases in northern Iraq. In return, it is demanding wider constitutional rights for Turkey's 15 million Kurds.

Turkey's clout in the Middle East is taking a beating with the brutal sidelining of Egypt's Muslim Brotherhood derailing Ankara's hopes to lead a regional surge of Islamist political power, analysts say.

Turkey's ruling Justice and Development Party (AKP) was an early supporter of the 2011 uprising that ousted President Hosni Mubarak and subsequently nourished close ties with the Muslim Brotherhood.

Turkish Prime Minister Recep Tayyip Erdogan on Thursday denied rumors that he was sick and lashed out at the local media for disseminating false news.

"Thank God, I am doing quite well," Erdogan told reporters at Ankara airport before leaving for Turkmenistan.