Moscow (CNN) At least one person has been killed after a gunman opened fire near the headquarters of Russia's main intelligence agency in Moscow, Russian state news agency RIA Novosti reported.

At least five people were injured in the shooting near the Federal Security Service (FSB) building on Thursday, according to the Ministry of Health. Two FSB officers suffered severe injuries, the Ministry of Health said. One FSB officer was shot dead, RIA said, citing an FSB representative.

Social media footage from the scene captured the sounds of gunshots and screams as people fled the area.

Russian state TV channel Rossiya 24 said that the perpetrator had been "neutralized." Traffic in the area was blocked in the wake of the incident, according to the Center for Traffic Management (DPC).

Russian police officers next to the FSB's office in Moscow.

A police cordon remained in place after the shooting and emergency vehicles and cars were parked outside the FSB's headquarters.

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