BEIRUT — Bolstered by a declaration of support from NATO, Turkey warned Syria on Tuesday that it would retaliate if Syrian forces approach its southern border,
signaling a significant escalation of tensions between the two neighbors following thedowning of a Turkish jet.
The warning coincided with a strong condemnation of Syria by NATO, which weighed into the Syria crisis for the first time with a statement calling the attack on the plane “unacceptable” and stressing that the alliance stands with Turkey “in the spirit of strong solidarity.”