Rat is suspected cause of Monday's Fukushima outage

Tokyo Electric Power Co's tsunami-crippled Fukushima Daiichi nuclear power plant seen earlier this month. Credit: Reuters

Tepco, the company behind the Fukushima nuclear power plant, suspects a rat might have caused Monday's outage.

The Japanese firm released a picture of a rodent carcass which it says probably triggered a short-circuit in a switchboard.

In March 2011 a massive tsunami caused a meltdown at the plant on the country's north east coast.