Israel's air force began a "surprise exercise" to improve combat readiness along the country's northern border, the military said on Monday.
The military said that during the drill, will which last until Wednesday, there would be an increase of air traffic throughout the country and that explosions could be heard in northern Israel.
It said the "exercise simulates combat scenarios in the northern front, and will test all components in the (air force's) core missions, including maintaining aerial superiority, protecting the country's skies, as well as attacking and gathering intelligence."