BEIRUT - Syria's isolation deepened Monday with the defections of high-ranking military officials, new EU sanctions and plans for an emergency NATO meeting over the downing of a Turkish warplane.
Deputy Prime Minister Bulent Arinc of Turkey also accused the Syrians of shooting at a second Turkish plane - a search-and-rescue aircraft deployed to look for the warplane that was hit Friday off the Mediterranean coast, Turkey's Anatolian News Agency reported. Arinc did not specify where that incident happened or whether the second plane was hit, but said Turkish officials had contacted the Syrians afterward and "this assault was immediately halted."
There was no immediate comment from Syria to that accusation. But earlier Monday, seeking to publicly justify the shooting of the warplane and to profess no ill will toward Turkey despite rising tensions between the neighbors, the Foreign Ministry's spokesman told reporters in Damascus that the warplane had violated Syria's territory.
"We had to react immediately," said the spokesman, Jihad Makdissi. "Even if the plane was Syrian we would have shot it down."
Turkey says the warplane was over international waters when it was shot down after straying briefly into Syrian airspace.
Makdissi's comments came a day before emergency talks at NATO headquarters in Brussels over the episode, which has heightened regional tensions springing from the 16-month crackdown on the antigovernment uprising in Syria. Referring to the NATO gathering, Makdissi said that "if the goal of that meeting is aggression, we say that Syrian airspace, territory and waters are sacred."
The warning came as Turkish officials Monday reported a further group defection by high-ranking Syrian military officers, adding to the strains between the two countries.
In Luxembourg, the European Union renewed its condemnation of the violence in Syria and tightened its sanctions on the Syrian regime another notch, targeting "banking, military and state media entities," Foreign Secretary William Hague of Britain said.
"We have also decided to strengthen the arms embargo so that the insurance and reinsurance of arms shipments is explicitly prohibited," he said after a meeting of EU foreign ministers.
Last week, a British insurer canceled coverage of a Russian freighter carrying helicopters and antiaircraft weapons to Syria.
In a statement, the European Union foreign ministers also condemned "the unacceptable shooting down by Syria of a Turkish military plane," praised Turkey's "measured and responsible initial reaction" and called on Syria to "allow full access for an immediate investigation."
The Turkish foreign minister, Ahmet Davutoglu, said in a Twitter message posted from his official account Sunday that Turkey, a NATO member, would invoke Article 4 of the NATO treaty, which provides for consultations by the allies when one of them is attacked or threatened. He did not cite the much stronger Article 5, in which an attack on one member is considered an attack on all NATO countries and obliges a concerted response.
Davutoglu posted the messages after he told state-owned TRT television that the Turkish authorities' analysis of radar, visual and communications data had confirmed that their aircraft was struck by Syrian antiaircraft weapons outside of Syrian airspace.
"Our plane was hit in international airspace, 13 nautical miles out of Syria, when Syrian territorial space is 12 miles," he said.
He said the Turkish investigation had left no doubt that the aircraft, a two-seat F-4 Phantom, had briefly strayed over Syria but had been shot down after leaving its territory.
Syria disputed that account Monday, with Makdissi saying the plane was brought down by a surface-to-air weapon with a range of less than 2 miles.
Turkey is a major regional player, but its relations with neighboring Syria have worsened over the months of bloodletting, during which the country has sided with those Western and Arab powers seeking the ouster of President Bashar Assad.
More than a dozen Syrian generals have been reported seeking refuge in Turkey as the bloodletting in their own land has intensified. Last week, Jordan said it had granted asylum to a Syrian air force colonel who defected piloting a MiG warplane. Overall, some 33,000 Syrians have sought refuge in Turkey after the Syrian uprising.
The developments came as the lead investigator in a U.N. human rights inquiry into abuses in the Syrian conflict confirmed Monday that he was visiting Damascus for the first time. The investigator, Paulo Pinheiro of Brazil, said in a brief telephone interview from Damascus that he regarded the visit as significant because the Syrian authorities had never permitted him or members of his panel into the country.
"It was a breakthrough," Pinheiro said.
He declined to elaborate on his activities in Syria or why the Syrians had allowed him in.
Pinheiro, whose panel has issued harshly critical reports of the Syrian authorities, based on interviews with refugees from the conflict, is due to present an update to the Human Rights Council in Geneva this week.