Rolling coverage of the potential terror attack in St. Petersburg, Russia.
Russian police are searching for two men believe to have carried out the bombing of St. Petersburg's metro. The attack occurred while Putin was in St. Petersburg, raising speculation about the timing and intent of the bombing.
While there is no conclusive evidence of a particular party or agent responsible for today's blast, Russia has - like many other nations across the world - experienced returning ISIS fighters who present a security threat. In November, Russian police arrested potential ISIS cells in multiple raids.
As Colin Clarke writes in Politico today, Islamic extremists - and ISIS in particular - have newly refocused their hostility toward Russia, which has helped propped up the Assad regime in Syria, which has used chemical weapons in the ongoing civil war in that country.
Authorities in St. Petersburg have confirmed that there has only been one blast in the St. Petersburg metro system, contradicting earlier reports of two.
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Video has emerged of the immediate aftermath of one of the explosions. Authorities have told Interfax that the blasts were caused by explosive material left inside the cars. The blasts occurred around 2:30pm local time.
— Alex Kokcharov (@AlexKokcharov) April 3, 2017
According to Russian authorities, blasts in the St. Petersburg metro have claimed at least 10 lives. Two explosions have been reported in the Sennaya Ploschad and Tekhnologichesky Institut stations. The highly trafficked transit system sees more than 2 million travelers each day. So far, this is no confirmation of the cause of the blasts, though similiar incidents in the past - such as the March 29, 2010 attacks in Moscow that occurred during rush hour - turned out to be terror attacks.