"However, all my life I have come across small men occupying big offices who do not have the vision to see the larger picture", said Imran Khan. Khan's letter comes a month after Modi own letter on 20 August in which the prime minister said that India was committed to peaceful neighbourly ties with Pakistan. In its clarification, it was cited that the evil agenda of Pakistan stands exposed.
"Since yesterday's announcement of a meeting between the foreign ministers of India and Pakistan in NY later this month, two deeply disturbing developments have taken place", the government statement said.
India pulled the plug on a meeting between its foreign minister and her Pakistani counterpart, set for next week on the sidelines of a major United Nations conference, just one day after saying it would go ahead.
India cancelled a rare meeting scheduled to have taken place on the sidelines of the UNGA.
The Pakistani statement also defended the postage stamps, saying they "highlight the gross and systematic human rights violations" Indian forces are committing against residents of Kashmir on their side.
The Bharatiya Janata Party's (BJP) remarks came after Khan hit out at India for cancelling a meeting between the foreign ministers of the two countries on the sidelines of the United Nations General Assembly (UNGA) in NY this month.
Last night, the Pakistan foreign ministry had described the comments on Khan as "against all norms of civilised discourse and diplomatic communication".
Pakistan Prime Minister's reaction has come almost 24 hours after Inda's called off the proposed foreign ministry-level talks with Pakistan blaming the country for the killing of three soldiers in Jammu and Kashmir's Shopian district.
On September 14, Mr Khan had written to Mr Modi about India and Pakistan resuming dialogue that have been suspended since 2015.
Pakistan also recently issued postage stamps of Burhan Wani, a charismatic Kashmiri militant commander killed by Indian troops in July 2016, whose death sparked a wave of violent protests in the territory.
Meanwhile, Pakistani Army's chief spokesman Maj Gen Asif Ghafoor said India was trying to divert attention from its domestic problem by calling off talks with Islamabad and resorting to baseless propaganda, Pakistani newspaper The News reported. It is part of the Army's professional code of conduct.