The agreement was criticized in India because it contained no war pact or renouncement of guerrilla warfare in Kashmir. After the signing of the agreement, Indian Prime Minister Lal Bahadur Shastri mysteriously died in Tashkent.  Shasti`s sudden death led to persistent conspiracy theories that he was poisoned.  The Indian government refused to downgrade a report on his death claiming that it could harm foreign relations, cause disruption in the country and a violation of parliamentary privileges.  In accordance with Tashkent`s statement, discussions took place at ministerial level on 1 and 2 March 1966. Despite the fact that these talks were unproductive, diplomatic exchanges continued in the spring and summer. The results of these discussions were not obtained due to differences of opinion on the Kashmir issue. The news of Tashkent`s statement shocked the people of Pakistan, who expected India to make more concessions than they got. Things got even worse when Ayub Khan refused to speak and went to solitary confinement instead of announcing the reasons for signing the agreement.
Protests and riots took place at various locations in Pakistan.  To dispel the anger and concerns of the people, Ayub Khan decided to take the matter before the people on 14 January 1966. This is the difference with Tashkent`s statement that eventually led to the impeachment of Zulfikar Ali Bhutto from the Ayub government, which later founded his own party, the Pakistan People`s Party. Although Ayub Khan was able to satisfy the concerns of the people, Tashkent`s declaration significantly tarnished his image and was one of the factors that led to his downfall.  The Tashkent Declaration was a peace agreement between India and Pakistan to resolve the 1965 Indo-Pakistan war (August 5, 1965-September 23, 1965). It was signed in Tashkent, the capital of Uzbekistan, which in turn was part of one of the republics of the USSR. The main objective was to restore economic and diplomatic relations in the countries concerned, to stay away from the internal and external affairs of the other and to work towards the advancement of bilateral relations. The Tashkent Declaration was a peace agreement between India and Pakistan, signed on 10 January 1966, which resolved the 1965 Indo-Pakistan war.
Peace was achieved on 23 September by the intervention of the external powers that pushed the two nations to the truce, lest the conflict intensify and attract other powers.  VI The Indian Prime Minister and the President of Pakistan agreed to consider measures to restore economic and trade relations, communication and cultural exchanges between India and Pakistan and to take steps to implement existing agreements between India and Pakistan. Indian Prime Minister Lal Bahadur Shastri and Pakistani President Ayub Khan met on 4 January 1966 in Tashkent. The two heads of state and government signed a pact called the Tashkent Declaration of 1966. An agreement signed by Indian Prime Minister Lal Bahadur Shastri and Pakistani President Ayub Khan in the Soviet city of Tashkent to end the Second Indo-Pakistan War on Kashmir.