"According to the latest information, there are 40 injured ... Eight people remain in hospitals," Zoya Melnikova said.
The health authorities earlier said one person was killed and 32 others were injured in the explosions.
Explosions initially rocked the depot on August 5. Several days later, a lightning hit the same military facility, causing new blasts.
On 9 August, the Russian Armed Forces’ Central Military District said that lightning had hit an ammunition rack. Nine people were injured in a blast near a railroad on the Uluy-Achinsk section in the Krasnoyarsk Territory and four of them were subsequently hospitalised, a spokesperson for the local emergency service has said.
A state of emergency was declared on 9 August in Achinsk district due to the explosions.