Tear gas shell has been thrown back towards police as policeman gets exausted, Indian Kashmir police unleashed the teargas shells on monday to stop thousands of Muslims from marching towards Muzaffarabad,capital of Pakistan administrated kashmir in Srinagar August 11, 2008. Kashmiri separatist leaders, who called the march to protest against an economic blockade of the Muslim-majority Kashmir valley by Hindu extremists, were also placed under house arrest, police said,11/08/08