The United Arab Emirates on Tuesday pledged $100 million to Syria and Turkey, one of the largest sums yet following a massive earthquake that has killed thousands.Fellow Gulf country Saudi Arabia, which severed diplomatic ties with Syrian President Bashar al-Assad's regime in 2012, also said it would provide assistance. The oil-rich UAE -- which had already pledged some $13.6 million to Syria -- is spearheading regional relief efforts, having dispatched planes to both countries with relief items and rescue teams following the 7.8-magnitude quake that struck early Monday.