Syria’s president, interior minister, and foreign minister were the targets of five foiled assassination attempts last year, the U.N. chief said in a report on threats posed by Islamic State militants released Wednesday.

The report said President Ahmad al-Sharaa was targeted in northern Aleppo, the country’s most populous province, and southern Daraa by a group called Saraya Ansar al-Sunnah, which was assessed to be a front for the Islamic State group.

The report, issued by Secretary-General António Guterres and prepared by the U.N. Office of Counter-Terrorism, gave no dates or details of the attempts against al-Sharaa or Syrian Interior Minister Anas Hasan Khattab and Foreign Minister Asaad al-Shibani.

The assassination attempts are more evidence that the militant group remains intent on undermining the new Syrian government and “actively exploiting security vacuums and uncertainty” in Syria, the report said.

It said the front group provided IS with plausible deniability and "improved operational capacity.”

In November, his government joined the international coalition formed to counter the Islamic State group, which once controlled a large part of Syria.

The U.N. counter-terrorism experts said the militant group still operates across the country, primarily attacking security forces, particularly in the north and northeast.

In one ambush attack on Dec. 13 on U.S. and Syrian forces near Palmyra, two U.S. servicemen and an American civilian were killed, and three Americans and three members of Syria's security forces were wounded. President Donald Trump retaliated, launching military operations to eliminate IS fighters.

According to the U.N. counter-terrorism experts, the Islamic State group maintains an estimated 3,000 fighters across Iraq and Syria, the majority of them based in Syria.

The U.S. military in late January began transferring IS detainees who were held in northeastern Syria to Iraq to ensure they remain in secure facilities. Iraq has said it will prosecute the militants.