U.S. President Donald Trump met with Syria's president in Saudi Arabia on Wednesday and urged him to normalise ties with longtime foe Israel, after a surprise U.S. announcement that it would lift all sanctions on the Islamist-led government.

Gulf states are keen to invest in Syria, which has important mineral and oil reserves, but had been prevented from doing so by U.S. sanctions. President Trump has now pledged to lift the restrictions.

U.S. President Donald Trump on Wednesady became the first American president to meet with his Syrian counterpart in a quarter of century, holding informal talks with interim President Ahmed al-Sharaa in Riyadh.