NATO Secretary General Anders Fogh Rasmussen said in Lithuania that the Syria issue was high on the agenda of the meeting with EU defense ministers on Thursday evening.
"Syria was discussed among defense ministers last night," the NATO secretary general told Vilnius journalists on Friday morning.
He has restated belief that the international community must respond to the chemical attack, which the West has accused the Damascus regime for.
"I urge international community to overcome these divisions over Syria. I think the international community has a responsibility to uphold and enforce the international ban against the use of chemical weapons, and this is also reason why I do believe that we need a firm international response to what we have seen in Syria: the use, the regime's use of chemical weapons," Rasmussen said at the Lithuanian parliament.
Syria will top the agenda of the two-day meeting of EU foreign ministers due to start in Vilnius on Friday afternoon.
EU member-states do not hold a common stance on Syria – France is the strongest supporter of a military response, while other countries are more skeptical and favor a sanction from the United Nations (UN) Security Council.
US Secretary of State John Kerry is scheduled to join the meeting on Saturday.
The US, Russia, and other most powerful countries discussed the Syria issue during the G-20 summit in St. Petersburg on Thursday. However, they failed to settle their major disagreements over the US plan to deliver a military strike against the al Assad regime.
Russia and China, which have a veto right in the UN Security Council, object to the US-led military action against the Syrian government.
