At least twelve people are missing after an explosion at a factory in Sergiev Posad, northeast of Moscow, the Russian Investigative Committee, which is handling the case, announced, citing AFP.

Earlier it was reported that nine people are considered missing.

“12 people are considered missing,” said the message of the regional office of the Investigative Committee of Russia, published on Telegram.

The woman died in the hospital, 15 of the 80 people who sought medical help are in the hospital, according to the latest report of the Ministry of Health.

On Wednesday, a powerful explosion occurred at a warehouse of “pyrotechnic products” in Sergiev Posad, about fifty kilometers from Moscow, which caused a fire and blew out the windows of several nearby buildings.

“Search and rescue operations are ongoing,” the regional administration reported on Thursday.

A total of 400 people are “involved” in the search, the Ministry of Emergency Situations reported on Telegram.

He posted images of the destroyed building showing broken bricks, excavators in action and helmeted rescuers, some accompanied by sniffer dogs.

“Investigators searched the premises of the Piro-Ross company, as a fire broke out in (their) warehouse,” the investigative commission said.

“34 people were interrogated as witnesses,” the company’s technical director was detained as a suspect, the investigative body added.

Moscow Region Governor Andriy Vorobyov said on Wednesday that investigators have ruled out the possibility of a drone attack, although the Russian capital and its region regularly become targets of such operations attributed to Ukraine.