Bomb explodes, injures at least 10 at busy Russian supermarket in St. Petersburg

At least 10 people were injured and taken to a hospital Wednesday after a bomb went off in a busy supermarket in St. Petersburg, Russia, according to ABC News.

What happened?

The bomb exploded at about 6:30 p.m. local time inside a storage locker on the ground floor of the Perekrestok supermarket in Kalinina Square. Thousands of shoppers were believed to be in the market at the time of the blast, the Daily Caller reported.

At least one person is said to be in serious condition, according to The Mirror's report. There are no reported deaths.

"According to the preliminary assessment by explosives experts, an improvised explosive device, equivalent to 200 grams of TNT," the Russian Investigative Committee told The Mirror in a statement. "The device was filled with projectiles."

The motive for the bombing is not yet clear.

”All possible versions of what has happened are being worked on," Alexander Klaus, head of St Petersburg's investigative committee, said.

What else?

The explosion comes just days after a terror plot targeting St. Peterburg's Kazan Cathedral was foiled by CIA intelligence-sharing efforts.

Following the tip, Russian authorities seized a "significant amount of explosives" and "extremist literature," The Mirror reported.

On Sunday, Russian President Vladimir Putin thanked President Donald Trump during a phone call for the CIA's warning.