A terrorist group that is said to be linked to Al Qaeda claimed responsibility for the recent bombing of the St. Petersburg subway system, according to a statement by the organization posted on Tuesday by the SITE Intelligence Group, which monitors extremist communications.
Russian investigators identified Akbarzhon A. Dzhalilov as the suicide bomber who carried out the April 3 attack, which killed 15 people and wounded at least 60. Security officials at the time said they were unsure whether Mr. Dzhalilov had acted alone, and they detained several other people in connection with their investigation.
The group claiming responsibility, the Imam Shamil Battalion, said in its statement that Mr. Dzhalilov acted on the orders of Ayman al-Zawahri, the leader of Al Qaeda, and it threatened additional attacks. The claim of responsibility was issued by a Qaeda channel out of North Africa, unusual for a Europe-based attack. Al Qaeda has not claimed a successful attack in Europe since the 2015 assault on the offices of the satirical newspaper Charlie Hebdo in Paris.
Read more: New York Times