The families of nine Lebanese pilgrims kidnapped by rebels in Syria staged on Tuesday a sit-in near the Turkish embassy in Rabieh, vowing to forbid Turkish nationals from setting their feet on Lebanese soil.

“We will harass all Turks in Lebanon. They can leave the country if they don't like our move,” spokeswoman for the families of the abducted pilgrims Hayat Awali told LBCI TV's reporter.

Extremists from war-torn Syria are slipping into Turkey despite heightened security precautions, Turkish President Abdullah Gul was quoted as saying on Monday.

"We aren't managing to prevent terrorist infiltration despite all precautions taken and the deployment of cannons and tanks" along the Turkish-Syrian border, Gul told Turkish press from New York, where he is attending the U.N. General Assembly.

Turkey's air force on Sunday paid tribute to the crew who shot down a Syrian military helicopter which it said had violated Turkish airspace.

Air Force Commander General Akin Ozturk has "honored the personnel who applied rules of engagement toward a Syrian helicopter which refused to leave the airspace last week despite warnings," the air force command said in a statement.

Turkish police shot dead one suspect and wounded another after a rocket attack on a police headquarters in the capital Ankara late Friday, officials said.

During the Friday attack, two rockets hit the police building in the Dikmen suburb and another device that did not explode was found in a neighboring garden, Interior Minister Muammer Guler said.

A police headquarters building came under attack from rocket fire in the Turkish capital Ankara on Friday, however there were no victims, the Dogan news agency reported.

The attack happened at 1900 GMT in the Dikmen suburb, the agency reported, adding that police had set up roadblocks in a bid to intercept those responsible.

Lebanon's General Security directorate was informed Thursday by Turkish officials that the Lebanese pilgrims who were abducted in Syria's Aazaz are “doing well,” amid reports that the Wednesday takeover of the town by al-Qaida-linked fighters has sparked fierce clashes with the mainstream rebel Free Syrian Army.

“General Security chief Maj. Gen. Abbas Ibrahim has been informed by Turkish officials that the Lebanese abductees in Aazaz are doing well,” LBCI reported.

Turkey has temporarily shut its border post after fighting between Syrian rebels and an al-Qaida front group in the northern town of Aazaz, a government official said Thursday.

"The Oncupinar border gate has been closed due to activity and uncertainty on the Syrian side of the border," the official told Agence France Presse, adding that it was a temporary measure.

An al-Qaida front group fighting in Syria on Wednesday overran the northern town of Azaz near the border with Turkey after fierce clashes with rebels, activists told Agence France Presse.

"The Islamic State of Iraq and the Levant (ISIS) has seized complete control of Azaz. They are in control of the town's entrances," said Abu Ahmad, an activist inside the town.

Turkey warned Damascus Wednesday it would face "consequences" if it sought to avenge the downing of a Syrian military chopper this week, but said it did not believe a border attack was a retaliatory strike.

A car bomb exploded at Syria's rebel-held Bab al-Hawa border crossing into Turkey on Tuesday -- a day after Turkish warplanes shot down a Syrian helicopter which Ankara claimed violated its airspace -- according to a monitoring group.

Turkish Prime Minister Recep Tayyip Erdogan on Tuesday defended the military's downing of a Syrian helicopter which he said violated its airspace.

"The Turkish Armed Forces did what's necessary," Erdogan told a press conference, a day after its warplanes shot down the military helicopter which was detected two kilometers (1.2 miles) inside Turkish airspace.