"We welcome the EU action. Support for the opposition is a track that we are pursuing, even as we also work with the opposition in an effort to realise the Geneva Communique and bring about the political transition that is envisioned in it," White House Press Secretary Jay Carney said.
The Pentagon, however, has said there has been no change in US stand of not providing arms support to Syrian rebels following EU's decision.
"We've made clear in the past, and again make clear, our firm belief that providing arms to the Assad regime does not bring us closer to the political transition that Syria deserves. So our position on that has not changed," he said, referring to Russian arms sales.
Meanwhile, a media report said the White House has asked Pentagon to draw up plans for a no-fly zone to be enforced by the US and other countries such as France and the UK.
"All this effort to pressure the regime is part of overall effort to find a political solution, but what happens if Geneva fails? It's only prudent to plan for other options," the official said.
Meanwhile the State Department said the decision of the European Union to lift arms embargo against the Syrian rebels will advance their shared goal of achieving an negotiated political settlement.