However, he said that in conversations with other leaders after the attack, other heads of state had suggested improving international efforts to combat terrorism.
Unverified footage published by Russian media and Telegram channels with close ties to the Kremlin showed some of the suspects being interrogated.
One of the suspects was shown cutting off a part of her ear and stuffing it into her mouth. Another man had his hands tied and his hair held by an interrogator, with a black shoe under his head. Another was interrogated on a hospital bed.
When they appeared in court on Sunday night, one had his ears bandaged, another had bruises on his face and another was seen dressed in hospital attire.
Asked about possible ill-treatment of suspects, Peskov said, “I leave this question without an answer.”