MOSCOW, March 25. /TASS/. Russian President Vladimir Putin is being briefed about the situation around the terror attack on Crocus City Hall from all relevant services, Putin’s press secretary Dmitry Peskov said.

On March 23, Director of Russia’s Federal Security Service (FSB) Alexander Bortnikov, Interior Minister Vladimir Kolokoltsev, Chairman of the Investigative Committee Alexander Bastrykin, and National Guard Director Viktor Zolotov reported to the president about the investigation of the terror attack.

"The president receives reports from all relevant services," Peskov said.

On the evening of March 22, a terrorist attack targeted the Crocus City Hall music venue in Krasnogorsk, Moscow Region, just over the Moscow city limits. According to the Russian Investigative Committee, the current death toll is 137, but may rise. The Moscow Region Health Ministry said that 182 people were injured.

Eleven individuals suspected of being involved in the terrorist attack have been apprehended, including four gunmen who were detained in the Bryansk Region, southwest of Moscow, as they attempted to seek refuge by crossing the nearby Ukrainian border.

President Vladimir Putin said in a televised address that, according to preliminary information, the Ukrainian side had prepared "a window" in the border especially for the terrorists to cross undetected. He promised to identify and punish all those who were behind the attack on Crocus City Hall and declared March 24 a day of national mourning for the victims.