Israeli Prime, Minister Benjamin Netanyahu, said Monday he will press German and French leaders next week to support his position that Iran should have no military presence in neighbouring Syria.
The US' military presence in Syria has regularly been condemned by the Syrian government as a violation of the state's sovereignty, as US military personnel are operating in the Arab Republic without approval from Damascus or the UN.
Netanyahu said he might also meet with British Prime Minister Theresa May.
The Syrian Observatory for Human Rights separately reported that rebels in the Deraa area of the southwest were reinforcing their positions as government forces arrived there.
Southern Syria is of concern to the United States, which previous year brokered a "de-escalation" deal with Jordan and Russian Federation that has largely contained the war near the frontier with Israel.
Violence on the border ceased Wednesday.
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US State Department spokeswoman Heather Nauert warned on May 25 that the US would take "firm and appropriate" measures against Damascus in the event of President Bashar al-Assad ordering an offensive in southern Syria. The Iranians denied they had fired any rockets.
Over the weekend, Iran and Israel also reportedly engaged in indirect negotiations over fighting in Daraa, according to a report on Saudi-owned news site Elaph.
"However after all the Syrian authorities all the time prefers an settlement over a army operation", he mentioned.
The two nations allegedly sent representatives to stay in a hotel in Amman, Jordan in next door rooms.
Earlier this month, Israel launched a large-scale attack on what it said were Iranian targets in Syria, raising fears of a major confrontation.
Israel's National Security Adviser Meir Ben-Shabbat left Monday for Washington for talks with his newly appointed counterpart there, John Bolton, regarding updating a framework agreement against Iran in the wake of US President Donald Trump's pullout from the 2015 nuclear deal.