Islamabad- Secretary Information Pakistan Muslim League-N Mushahidullah Khan has said sit-ins have caused a loss of 900 billion rupees to the national economy. Talking to newsmen in Islamabad, he said adventure of some elements has shattered the confidence of foreign investors. Mushahidullah Khan urged Imran Khan and Tahir-ul-Qadri to avoid pointing fingers at any one and end their sit-ins. He said using children and women as a human shield is regrettable and unfortunate. He also urged both the leaders to announce end of their sit-ins as the government had already accepted those demands which are under the purview of constitution.