World Bulletin / News Desk
"He [Azimov Abror Akhralovich] admitted his guilt," lawyer Armen Zadoyan was quoted as saying by TASS.
27-year-old native of the Central Asian region was detained near Moscow on Monday.
Azimov was accused of being involved in the attack and training the suicide attacker.
Russia’s Investigative Committee said on April 4 that Akbarzhon Jalilov, a 22-year-old Kyrgyz national, was identified as the man behind the metro blast a day earlier.