Russia has arrested more than 20 people in connection with an attack claimed by Islamic State that killed more than 140 people at a concert hall near Moscow. Russia accuses Ukraine of being behind the attack, a claim that Kyiv denies.
Key Points
More than 20 people arrested in connection with the attack
Russia accuses Ukraine of involvement, which Kyiv denies
The attack was claimed by Islamic State
Suspects include four gunmen from Tajikistan
Alleged coordination by Islamic State Khorasan, the Afghan branch of IS
Pros
Arrest of suspects may lead to uncovering more details about the attack
Efforts to combat terrorism are being made by apprehending those involved
Cons
Accusations against Ukraine have not been substantiated with evidence
Tensions between Russia and Ukraine may escalate due to these claims