The statement is the latest sign of IS's disregard for cultural heritage and its spurious interpretation of Islam.
The growing engagement of local NGOs in Kazakhstan's religious life 'is a great assistance to the state in the fight against violent extremism', observers say.
Recent moves in government are aimed at strengthening control over suspicious religious activity across the country, say observers.
The joint statement is considered an 'important step forward in the dialogue between Christians and Muslims'.
Al-Qaeda says 'Islamic State' members are unable to understand Islamic texts and are bent on carrying out treason and treachery wherever they have influence. The same however could be said of al-Qaeda.
Among other achievements, more than 500 Kazakh citizens abandoned radicalism last year, according to the Spiritual Administration of Muslims of Kazakhstan (DUMK).
Uzbekistan's efforts to improve religious tolerance and streamline the registration of religious organisations are being recognised internationally.
Kazakh authorities are working to rehabilitate militants and their families who have returned from Syria, while at the same time strengthening anti-terrorism laws.
New laws and reforms aim to protect children from the spread of extremist interpretations of Islam through the promotion of secular education and greater parental involvement.
More than 80 delegations from 46 countries participated in the Congress of Leaders of World and Traditional Religions in the Kazakh capital.