Manelis did not specify any actions that could be taken by Israel, but denied any claims that Israel is involved in the fighting in Golan Heights, or is assisting jihadists there.
The PA's foreign ministry charged in a statement on Saturday that Israel's announcement that it would defend the village of Hader was actually a forced reversal of Israeli policy.
The state media said the village lies near the disengagement line between Syrian and Israel.
"Hundreds of Syrians demonstrated inside the occupied territories off the town of Hadar, which has been subjected, since the dawn, to a violent terrorist attack launched by Jabhat al-Nusra and backed by the Israeli occupation entity from al-Tuloul al-Homr area that is adjacent to the Israeli-occupied Palestinian territories", SANA reported quoting "local sources in the Occupied Golan".
Al-Nusra Front is the old name for a jihadist group that was formerly Al-Qaeda's affiliate in Syria and is now known as the Fateh al-Sham Front.
"There has been heavy fighting [in Syria] since early this morning", Fakherldeen said.
It says it's ready to act to protect the Druze village of Hader, located on the Syrian side of the Golan Heights, after a vehicle bomb killed nine people and injured 23 others there.
"The IDF (Israel Defense Forces) is prepared and ready to assist the residents of the village and prevent damage to or the capture of the village Hader out of commitment to the Druze population", the military said in a statement.
Salman Fakherldeen, a founder of the al-Marsad Arab Human Rights Centre in the Golan Heights, told Tazpit Press Service (TPS) that some additional IDF troops arrived in the town overnight between Thursday and Friday, but said there has been a noticeable increase in the army's presence in town in recent hours.
The IDF said that it viewed the entry into Syria as a "serious security violation", and that soldiers had entered Syria in order to bring the Israeli Druze back.
Israel is widely believed to be harboring and supporting anti-Syrian government militants who have been wreaking havoc along Syria's Southwestern border regions.
The statement came after hundreds of Druze residents of Israel gathered at the border in support of their relatives on the Syrian side, according to Israel's Channel 2 News.
Speaking from London, Israeli Prime Minister Benjamin Netanyahu said "we safeguard our borders".
The PA ministry's statement accused Israel of supplying al-Nusra with weapons, salaries, medical aid and intelligence in exchange for keeping Israel's northern border with Syria safe.