A group called the Imam Shamil Battalion has claimed responsibility for the metro bombing in St. Petersburg, Russia this month.

The group is making claims weeks after the bombing that killed 16 people.

It, however, said the bomber was acting on orders from al Qaeda, according to the SITE monitoring group.

Reuters reports that in a statement by the group, originally published by a Mauritanian news agency and translated by SITE, the little-known group said the bomber, Akbarzhon Jalilov, had acted on instructions from al Qaeda leader Ayman al-Zawahiri.

The explosions took place on a subway car at the station.

Kremlin spokesman, Dmitry Peskov said President Vladimir Putin is aware of the reports of the explosions, state-run Russia 24 reported.

Putin was in St. Petersburg speaking at an event on Monday but it is not clear if he is still in the city.