Tokyo Electric Power Company (TEPCO), the operator of Japan's Fukushima Daiichi nuclear power plant, has released a aerial video of the earthquake-crippled nuclear plant, even as the severity of its nuclear crisis at the plant has been raised to a level 7 from 5.

The video was shot on Sunday, April 10, at Fukushima nuclear plant, using a remote controlled mini helicopter and shows damage at the No. 3 and No. 4 reactor, The Telegraph reported .

Japan earlier raised the severity of the nuclear crisis at the Fukushima plant putting it on par with the Chernobyl nuclear disaster in 1986.