President Obama said he discussed the "appalling violence being inflicted on the Syrian people by the Assad regime including the horrific chemical weapons attacks" with the Swedish Prime Minister during a one-day visit to the Scandinavian country.
He said: "I discussed our assessment which clearly implicates the Syrian Government in this outrage.
"The Prime Minister and I are in agreement that in the face of such barbarism the international community cannot be silent and that failing to respond to this attack would only increase the risk of more attacks and the possibility that other countries would use these weapons as well."
Obama made a personal appeal to the international community to unite in military action against 'barbarism' in Syria.
President Obama has received the support of prominent Republicans as he tries to gain backing for military action in Syria.
President Obama and his team are engaged in frenzied lobbying as lawmakers prepare to vote on a possible military strike in Syria.