National security and senior officials of Iran, Russia, China, India, Afghanistan, Tajikistan and Uzbekistan gathered in Tehran.

The event focuses on the Afghanistan issue and all-out fighting against different forms of terrorism.

The participants will hold bilateral talks on the sidelined of the event.

According to the Secretariat of Iran's Supreme National Security Council, Secretary of Russian National Security Council Nikolai Patrushev, Afghan national security adviser Hamdullah Mohib and Deputy National Security Advisor of India Rajinder Khanna took part in the event.

The first round of Regional Security Dialogue was held in aiming to increase coordination among regional countries to stand against Takfiri terrorism.

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