"The international community is unified in sending a clear message that the violence in Libya must stop, and that the Qaddafi regime must be held accountable," the administration said in a statement.
Britain also welcomed the League's statement.
"Clearly this is one indicator that there is broad support in that region," he said. "It's not the only condition. It's also necessary to have even broader international support and it's also necessary for it to be clearly legal."
Reuters notes that it is still unclear how Russia and China will respond to the Arab League's request. Both countries hold seats on the UN Security Council and are traditionally loath to involve themselves in what they consider other nations' domestic issues.