The US now has "little doubt" the Syrian government used chemical weapons against civilians last week, a senior reporter told Reuters. The Obama administration said a "serious response" would be required should evidence of such an attack emerge.
Gulf-based supporters have sent a 400-ton shipment of arms to Syria's outgunned rebels, one of the biggest to reach them in their two-year-old uprising, opposition sources said on Sunday.
The consignment - mostly ammunition for shoulder-fired weapons and anti-aircraft machine guns - came into northern Syria via the Turkish province of Hatay in the past 24 hours, and was already being handed out, the sources added.
One rebel officer told Reuters the flow of arms bound for rebels had increased since opposition groups accused the government of launching deadly chemical weapons attacks in Damascus on Wednesday.
The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.