Russians say no evidence yet of chemical attack; Trump condemns 'heinous' suspected attack in Syria

Latest: President Donald Trump has condemned the "heinous" suspected poison gas attack in Syria and said he will make a decision on the US response within 24 to 48 hours.

Update - 5.21pm: President Donald Trump has condemned the "heinous" suspected poison gas attack in Syria and said he will make a decision on the US response within 24 to 48 hours.

Speaking in the White House Cabinet Room, Mr Trump vowed to find out who is responsible for the attack that reportedly killed at least 40 people.