Dozens of cracks have been found in facilities built to contain radiation at Japan's Fukushima nuclear plant.
Tokyo-based Yomiuri Shimbun reported Sunday that 41 cracks were found in the plant's concrete floor.
It says Tokyo Electric Power Company appears to have neglected the facilities, with inspectors having discovered weeds growing through the concrete.
They believe there's a danger that radioactive substances may have seeped through the cracks and into the groundwater.
Inspectors have raised the issue with the power company, requesting maintenance work.