US Ambassador to the United Nations, Nikki Haley has said, the UN Security Council should step up pressure on Pakistan to change its behaviour.<br/>'<br/>Briefing reporters after returning from a UN Security<br/>Council visit to Afghanistan, she said, the Afghan government has asked the 15-member powerful wing of the world body to step up pressure on Pakistan. She said, the Afghan government is starting to see the Taliban concede.<br/>'<br/>The Kabul visit of UN Security Council members came ahead of the Kabul Process meeting next month where the Afghan government is expected to present its strategy for reaching a settlement with the armed opposition. <br/>'<br/>Pakistan is accused of supporting the Taliban and various militant groups in Afghanistan.