Tensions between India and Pakistan have risen sharply after a militant attack in Kashmir that killed 26 people. Indian police have named three suspected militants, saying two of them were Pakistani, but New Delhi has yet to provide any evidence of the links or provide further details.
Pakistan has vehemently denied any involvement, saying a previously unknown militant group calling itself the Kashmir Resistance claimed responsibility for the attack.
India has downgraded diplomatic relations with Pakistan, suspending a six-decade-old Indus River water-sharing agreement and closing the only land border crossing between the two countries. India's foreign ministry also said it would cancel all visas to Pakistani nationals from April 27 and advised Indians to avoid traveling to Pakistan.
In response, Pakistan closed its airspace to Indian airlines and rejected New Delhi's suspension of the Indus River Waters Agreement.
"Any move that threatens the sovereignty of Pakistan or the security of its people will be met with a strong and proportionate response across all sectors," the Pakistani Prime Minister's Office said in a statement.
The statement also said that any attempt to stop or divert water belonging to Pakistan would be considered an act of war.
