A mortar shell fired from Syria landed on the Israeli side of the Golan Heights Sunday night, followed by bursts of gunfire aimed at reporters and UN peacekeepers. There were no immediate reports of injuries.

The al-Qaeda affilliated Nusra Front Syrian rebel group took responsibility for the attack, NRG reported.

Earlier Sunday, Israeli forces shot down an unmanned aircraft as it entered the country from Syria near an area that has seen heavy clashes between Syrian troops and rebels forces, the IDF said.

The drone was hit with a Patriot missile as it flew near Quneitra, the Syrian town that has been the stage for fighting between rebels and regime forces in recent days.

Defense Minister Moshe Ya’alon praised the army’s swift response, which he said was “admirable,” and warned that Israel would not tolerate any attacks on its troops, “whether intentional or unintentional.”

“These past few weeks have proven that our tolerance for attempts to harm us is low, and if someone tries to test us, we will respond aggressively,” he said in a statement, alluding to the war in Gaza.

There have been several cases of cross-border fire from the Syrian fighting over the past several days, with the Israeli army hitting back in some cases.

On Saturday, two mortar shells exploded inside Israel near the Israel-Syria border in the Golan Heights, causing no injuries or damage, according to initial reports.

The explosions were believed to be strays from fighting between rebel groups and government troops on the Syrian side of the Golan, which has caught United Nations peacekeepers in the crossfire.

On Sunday morning, 40 Filipino peacekeepers made a bold escape from the border under fire, joining 75 others who escaped, but 44 more troops, from Fiji, remain in Nusra captivity, officials say.

Israel has shot down a number of drones sent into the country over the past years.

Last month, during Operation Protective Edge, an unmanned aircraft launched from the Gaza Strip was shot down by Israel as it penetrated Israeli airspace over the coast near Ashdod.

The drone set off air raid sirens in the city before it was downed by a Patriot surface-to-air missile launched from a location near the center of the country.