JERUSALEM, April 4 (Xinhua) -- U.S. President Donald Trump and Israeli Prime Minister Benjamin Netanyahu spoke early Wednesday, amidst Israel's concerns over U.S. planned withdrawal of troops from Syria.

The Israeli Prime Minister's Office released a statement, saying Netanyahu and Trump talked over the phone about "regional developments and Iran."

The statement did not elaborate on which developments were addressed.

However, according to the statement, "Netanyahu thanked President Trump for his commitment to Israel's security," and the two leaders "agreed to continue the close coordination between the two states in order to repel Iran's aggression and its attempts to destabilize the region."

On Thursday, Trump said the United States would "come out of Syria like very soon." However, according to a U.S. media report on Monday, the U.S. military has been working on plans to send dozens of additional American soldiers to northern Syria.

Israel worries that the U.S. withdrawal from Syria, its northern neighbor, would allow Iran to enhance its military foothold in Syria. Top Israeli officials have warned that Israel will not allow a military Iranian presence in Syria.

The Netanyahu-Trump talk came also as Russian President Vladimir Putin, Turkish President Recep Tayyip Erdogan, and Iranian President Hassan Rouhani met in Ankara.

The summit is aimed at discussing measures to consolidate the truce regime in Syria, ensure the operation of de-escalation zones and address the humanitarian problems in the war-torn country.