The United States, Britain and France stepped up a push for the United Nations Security Council to blacklist the head of Pakistan-based terrorist group Jaish-e-Mohammed (JeM) on Wednesday after China prevented an earlier move two weeks ago. The United States circulated a resolution - drafted with British and French support - to the 15-member council that would designate JeM leader Masood Azhar, subjecting him to an arms embargo, travel ban and asset freeze, diplomats said.