Turkey authorizes military operations in Syria

Lavrov, speaking at a press conference in Islamabad, said Syria has assured Russia, an ally, that such an incident as the shelling that killed the Turks will not happen again.

"It is of great concern for us," Lavrov said. "This situation is deteriorating with every coming day."

Germany's foreign minister, Guido Westerwelle, said NATO members agree on the need for solidarity but also on prudence in reacting to events on the Turkish-Syrian border.

The Turkish retaliatory shelling and steps to authorize possible military intervention against Syria were the latest events to sharply escalate tensions between the two former allies.

In June, Turkey reinforced its border with anti-aircraft missiles and threatened to target any approaching Syrian military elements after Syrian forces brought down a Turkish jet, killing its two pilots. Turkey said the plane was in international airspace, countering Syrian claims that it was in Syrian airspace.

Fraser reported from Ankara, Turkey. Associated Press writers Christopher Torchia in Istanbul, Elizabeth Kennedy in Beirut and Nahal Toosi in Islamabad contributed