New details about the perpetrators of the Moscow attack, and Putin questions their motives. About 140 people were killed and nearly 180 others were injured in the attack that occurred last Friday evening in the suburb of Krasnogorsk.

The authorities arrested 11 people, including 4 suspected perpetrators, in the Russian province of Bryansk near the Ukrainian border. The four suspects - who are of Tajik origin - appeared before a court in Moscow yesterday, Sunday, where a decision was issued to detain them pending investigation on terrorism charges.