Massive explosion shook Russian city Sergiev Posad. 80 people injured

“80 people were injured, 1 person died as a result of an accident at a plant in Sergiev Posad," the official said in a statement.
Nine people are still missing, including six employees of the warehouse and three firefighters who were responding to the initial fire, the Russian investigation committee said.
More than 300 personnel, 57 vehicles and four helicopters were deployed to the scene.
The explosion happened around 10:40 a.m. Wednesday local time (0740 GMT) at a pyrotechnics warehouse, which was being rented out on the optical-mechanical plant's territory by a private company, said Governor of the Moscow Region Andrei Vorobiev in a Telegram post.
Local media, citing a State Duma deputy, suggested that the blast could have occurred due to a "violation of technological processes."
The warehouse where the explosion occurred belonged to a company called Kristall, which produces and sells fireworks and other pyrotechnic products. Investigators had opened a criminal case into suspected violations of industrial safety rules that could have led to the explosion.
The cause of the incident remains under investigation.
Sergiev Posad is a city in Russia, northeast of Moscow. It's part of the Golden Ring cluster of ancient towns and known for the 14th-century Trinity Lavra Saint Sergius monastery complex. The Trinity Cathedral houses the tomb of Saint Sergius.