Turkey's President says his country would take the "necessary" action against Syria, a day after Damascus said it had brought down a Turkish military plane that had entered its air space.

According to AP, Abdullah Gul said Saturday, June 23 that Turkey was still trying to establish the exact circumstances of the incident and whether the jet may have been brought down in Turkish territory.

The incident further escalated tensions between the two neighbors, which used to be allies before the Syrian revolt began in March 2011. Turkey has become one of the strongest critics of the Syrian regime's brutal response to the country's uprising.

Turkish media say that Syrian and Turkish coast guards are conducting a joint search mission for the jet's two missing crew members on Saturday.