Israeli sirens have gone off on the Golan Heights over possible incoming rockets from Syria, where rebels are battling the Assad regime in Quneitra province.
The public system alarm comes after roads were closed in the area due to security concerns.
Syrian rebels under the banner of the Western-backed Free Syrian Army have launched an offensive to seize remaining positions held by the Syrian regime in Quneitra province. The rebel alliance does not include the al-Qaeda-linked Nusra front.
Quneitra is located around 70km southwest of the capital Damascus and has been the setting of heavy clashes between insurgents and the Syrian military backed by Hezbollah Shi'ite militia.
The IDF declared a section of the Golan Heights a closed military zone on Tuesday (16 June) and then lifted the decree.
The Nusra front allegedly killed at least 20 Druze villagers in north-western Syria.
The Syrian Observatory for Human Rights (SOHR), a London-based opposition group with a network of local sources, reported the mass killing took place in Qalb Lawzah in Idlib after an argument erupted between a Tunisian Nusra leader and villagers.
The Tunisian commander tried to seize a house belonging to a Druze man who he claimed was a soldier loyal to the Assad regime. That caused a reaction from the relatives of the owner who attempted to block the jihadist.