Taking a tough position on the tension that has flared on the Line of Control after an Indian soldier was beheaded, Prime Minister Manmohan Singh Tuesday warned Pakistan that it cannot be “business as usual” between the neighbours following the incident and those responsible must be brought to book. In simultaneous steps that underlined the chill creeping into India’s relations with Pakistan, New Delhi suspended a decision to give visas on arrival to senior Pakistani citizens and India’s hockey and cricket authorities moved to prevent Pakistani players from playing in India.