India, April 24 -- Pakistan on Thursday shut its airspace to all Indian airlines and suspended all trade with India, including through third countries, and downgraded diplomatic relations in response to a slew of punitive measures announced by New Delhi over the Pahalgam terror attack that killed 26 people on Tuesday.

Most of the steps announced by Pakistan after a meeting of the National Security Committee chaired by Prime Minister Shehbaz Sharif in Islamabad were tit-for-tat responses to measures announced by India on Wednesday. Pakistan rejected India's decision to suspend the Indus Waters Treaty of 1960 and said any stopping or diversion of the flow of water belonging to Pakistan under the pact will be seen as an "act of war" and res...