Dhaka, Aug. 21 -- Japanese technicians at the stricken Fukushima nuclear plant have sent in remote-controlled robots to one of the damaged reactor buildings as part of preparations to remove radioactive debris.

Dangerously high radiation levels mean that removing melted fuel and other debris from the plant hit by a huge tsunami in 2011 is seen as the most daunting challenge in the decades-long decommissioning project.

Around 880 tonnes of hazardous material remain inside the power station, site of one of the world's worst nuclear accidents after a tsunami triggered by a 9.0-magnitude earthquake in 2011.A spokesman for plant operator TEPCO told AFP that the company had deployed two robots "Spot" and "Packbot" at one of the damaged reacto...