This will create some very interesting reactions:
Turkey's military says it has lost contact with one of its military aircraft over the sea close to the border with Syria.
Turkish media said the plane had crashed into Syrian territorial waters.
However, eyewitnesses in the northern Syrian town of Latakia told BBC Arabic that Syrian air defences shot down an unidentified aircraft near the town of Ras al-Baseet.
Ras al-Baseet is in Syria about 10 miles from the Turkish border.
Most interesting will be how the Turkish people will react to that. So far a wide majority of Turks is against any intervention in Syria:
An opinion poll by the Ankara Social Research Center published this month has found that more than two-thirds of those polled opposed any intervention by Turkey in Syria. The poll also revealed that a majority, even those who support the Turkish prime minister's party, believed Ankara should not take sides in the conflict.
Erdogan is facing critic even inside his party for having miscalculated on Syria and having been overly eager to support the Syrian opposition.
I find it unlikely that the downed jet will change that.