The Israeli military said it has shot down a Syrian fighter jet that entered its airspace.
The advance of the Syrian Sukhoi fighter jet was monitored on Tuesday before the Israeli military shot it down with a pair of Patriot missiles after it entered Israeli airspace by about two miles.
It is only the second such incident along the border in 30 years.
The military said there had been an increase in the internal fighting in Syria since the morning hours, including an increase in the activity of the Syrian air force.
Israeli forces said they are on high alert and would continue to protect Israeli territory.