In the days since, tensions have risen dangerously between India and Pakistan, which have fought two of their three wars over Kashmir.

In response, Pakistan also announced shutting its airspace to all Indian airlines and suspended trade with New Delhi including through third countries. Islamabad also rejected India's suspension of the Indus Waters Treaty and said any measures to stop the flow of water belonging to Pakistan under the pact will be seen as an "act of war".

An attack on tourists in India's Himalayan territory of Kashmir this week sparked a new crisis between nuclear armed South Asian neighbours India and Pakistan, with New Delhi blaming militants with "cross-border linkages" for the killings.