Dozens injured in explosion at Russian military optics plant near Moscow

A powerful blast occurred at a warehouse on the grounds of an optics plant near Moscow that supplies the Russian military.
At least 49 people were injured in the explosion at the Zagorsk Optical Mechanical Plant in Sergiev Posad.
The cause of the blast is under investigation but initial reports suggest it originated in a pyrotechnics warehouse rented by a private company.
The incident comes amid unease in Russia over drone attacks reportedly launched by Ukraine on targets in Russia.
Flights at a Moscow airport were briefly halted due to drone activity, with Russia claiming it shot down drones aimed at the capital.