Turkish Prime Minister Ahmet Davutoglu on Monday rejected holding talks with Turkey's main pro-Kurdish party over a new constitution because of the "disrespectful" attitude of its leadership.

The premier's blackballing of the Kurdish Peoples' Democracy Party (HDP) from discussions comes as the army wages a relentless campaign against Kurdish militants in the southeast.

A three-month baby and her grandfather were killed in crossfire in clashes between Turkish security forces and Kurdish militants in the southeast, medics said on Sunday.

The family's house in the southeastern town of Cizre came under shelling on Friday night as clashes intensified between Turkish security forces and the outlawed Kurdistan Workers' Party (PKK).

Arab League chief Nabil al-Arabi condemned on Thursday a Turkish military deployment in Iraq as a violation of international law, at a meeting called by Baghdad to pressure Ankara on withdrawing the forces.

"The Turkish military incursion into Iraq is a clear violation of international law and Iraqi sovereignty," Arabi said at the start of the foreign ministers meeting in the Cairo headquarters of the pan-Arab bloc.

A female cleaner was killed and another wounded early Wednesday after an explosion near a plane at Istanbul's second international airport, with Turkey on high alert for possible attacks.

The authorities said it was too early confirm if the airport had been targeted in an attack, but the transport minister said there had been no security lapses.

His neighborhood battered by shelling and food running out, Bahattin Yagarcik hunkers down in a basement along with several other families to take cover from the standoff between the Turkish military and Kurdish rebels in southeastern Turkey.

Yagarcik's hometown of Cizre and the nearby town of Silopi in Sirnak province in the Kurdish majority southeast have been under curfew since early last week as the army wages an all-out offensive against the outlawed Kurdistan Workers' Party (PKK) in the town's streets.

Turkish Prime Minister Ahmet Davutoglu on Tuesday criticized a visit to Russia by the main Kurdish opposition party leader, at a time when Ankara is at loggerheads with Moscow over the downing of a Russian warplane.

Selahattin Demirtas, leader of the opposition Democratic Peoples' Party (HDP), is set to meet Russian Foreign Minister Sergei Lavrov on Wednesday, the first high profile trip by any Turkish figure since the plane crisis.

Turkish police killed two female "terrorists" in a pre-dawn raid Tuesday on a cell of suspected militants in Istanbul, media reports said.

The Dogan news agency said the clash, which also left four police lightly wounded, took place in the Gaziosmanpasa district in the north of the European side of the city.

Eighteen people drowned overnight when their boat sank in the Aegean Sea as it was heading for the Greek island of Kalymnos, Turkish media reported early Saturday.

Another 14 people, among them Syrians, Iraqis and Pakistanis, were pulled to safety by the Turkish coastguard, the Dogan news agency reported.

Turkish security forces on Friday pressed on with a relentless operation to root out Kurdistan Workers' Party (PKK) rebels from two urban centers in the troubled southeast that has left at least 55 militants dead and angered Kurdish representatives.

With the crackdown now in a fourth day, a Turkish soldier was killed in intense clashes with the PKK, the first fatality suffered by the army in the operation, the security sources told AFP.

Israel and Turkey have reached "understandings" to normalize ties, at a low since the Jewish state's deadly 2010 raid on a Turkish ship headed for the Gaza Strip, an Israeli official said Thursday.

The deal, drafted at a secret meeting in Switzerland, calls for Israel to compensate victims of the raid, a return of envoys and the start of talks on gas exports to Turkey, the unnamed official said.