TASHKENT, March 29. /TASS/. Special services from states members of the Shanghai Cooperation Organization (SCO) are ready to cooperate with their Russian colleagues, investigating the deadly attack on the Crocus City Hall concert venue just outside Moscow, a senior official said.

"The Regional Anti-Terrorist Structure of the SCO and special services of the Shanghai Cooperation Organization’s member states are ready to cooperate with their Russian colleagues in investigating the heinous terrorist act, committed in the Crocus City Hall venue in the Moscow Region," said Ruslan Mirzaev, who heads the Regional Anti-Terrorist Structure’s Executive Committee.