ANKARA, Turkey (AP) — NATO ambassadors will discuss this week whether to respond to Syria's downing of a Turkish jet in what Turkey insists was international airspace, although the likelihood of any military action by the alliance is low. The plane's downing has further hiked regional tensions over the conflict in Syria, where some 40 people were said to have died Sunday in new clashes between rebels and regime forces.
The jet's wreckage was found in the Mediterranean at a depth of 4,265 feet (1,300 meters), Turkish state media reported Sunday. The two pilots remain unaccounted for.
Turkish Foreign Minister Ahmet Davutoglu said the jet was on a training flight to test Turkey's radar capabilities, not spying on Syria. He said the plane mistakenly strayed into Syrian airspace Friday, but was quickly warned to leave by Turkish authorities and was a mile inside international airspace when it was shot down off the coast of Latakia.
Syria insisted Saturday that the shooting was "not an attack" and that the aircraft had violated its airspace. But Turkish authorities say Syria didn't warn the Turkish plane nor send its own jets to confront it. Turkish Prime Minister Recep Tayyip Erdogan was expected to make a statement Tuesday and might announce some retaliatory steps.
"No one should dare to test Turkey's capabilities," Davutoglu said Sunday.
Meantime, at the request of Turkey, NATO's governing body will meet Tuesday to discuss the incident, said Oana Lungescu, a NATO spokeswoman. The consultations were called under article 4 of NATO's founding Washington Treaty.
"Under article 4, any ally can request consultations whenever, in the opinion of any of them, their territorial integrity, political independence or security is threatened," Lungescu said. The North Atlantic Council — the ambassadors of the 28 NATO countries — will decide whether to respond, she said.
The last time article 4 was invoked was nine years ago — also by Turkey — after tensions with neighboring Iraq escalated. However, that case did not lead to the invocation of article 5, which declares that an attack against any single NATO country shall be considered as an attack against them all.
Despite some opposition leaders' calls for Western military intervention in Syria, the United States and allies have been hesitant to get involved in what could prove a protracted conflict, preferring the diplomatic route. Syrian allies Russia and China have already shielded Syria from U.N. sanctions and stridently oppose any military intervention.
It's unlikely the downing of the Turkish plane will change those calculations, despite Ankara's appeal for the NATO meeting.
In October 1989, two Syrian MiG-21s violated Turkish air space and shot down a Turkish plane on a geographical survey mission, killing all five crew members. Syria at the time promised to severely punish the pilots, who disregarded Turkish orders not to enter Turkish airspace.
Dogu Ergil, a professor of political science at the Ankara University, told private NTV television that Turkey had repeatedly sent its jets across the Syrian border for several weeks to show its military muscle at the time.
The plane's downing drew criticism from other countries pushing Syrian President Bashar Assad to end his crack down on an increasingly armed popular uprising. Opposition activists say the conflict has killed 14,000 people, most of them civilians, over the past 15 months.
British Foreign Secretary William Hague said Sunday he was "gravely concerned by the Syrian regime's action in shooting down" the plane.
"This outrageous act underlines how far beyond accepted behavior the Syrian regime has put itself, and I condemn it wholeheartedly," Hague said in a statement. "The Assad regime should not make the mistake of believing that it can act with impunity. It will be held to account for its behavior."
Hague met last week with United Nations and Arab League special envoy Kofi Annan for talks on plans for an international summit, while British officials discussed the issue in Geneva on Saturday with members of Annan's team. Hague noted Sunday that "The UK stands ready to pursue robust action at the United Nations Security Council."
Italy's foreign minister decried the shooting down of the plane as "a further, very grave and unacceptable action by the Assad regime." In a written statement, Giulio Terzi promised that Italy will play an active role in the NATO meeting Tuesday.
Syrian activists reported violence in different parts of the country Sunday, saying nearly 40 people were killed.
The deadliest incident was in the northern town of Ariha where a shell hit a home killing seven members of the same family, the Britain-based Syrian Observatory for Human Rights said. A video posted online showed the seven men's bodies, some badly mutilated, including one who had part of his head blown off.
Activists also reported intense shelling and clashes between rebels and troops in the eastern city of Deir el-Zour and the central