Putin says radical Islamists carried out Moscow concert hall attack but doubles down on blaming Ukraine – as it happened

This live blog is now closed. For the latest on the Moscow concert hall attack, read our latest report:

• Putin says radical Islamists carried out Moscow attack but maintains claim Ukraine was involved

Dmitry Medvedev, Russia's former president and prime minister, discussed the suspects charged over the terrorist attack on the Crocus City concert hall on his Telegram channel on Monday.

Everyone asks me. What to do? They were caught. Well done to everyone who caught it," he wrote.