AP reports: More than 100 South Korean schools have canceled or shortened classes over fears that rain falling across the country may include radiation from Japan's stricken nuclear plant.

The Education Office of Gyeonggi province says it allowed schools to decide whether to open Thursday.

The prime minister's office says radiation levels in the rain are low and pose no health threat.

Still officials say that 126 schools in Gyeonggi province shut down and 43 others shortened class hours as a precaution. The province is near Seoul.

Nuclear safety experts have said that radiation leaking into the air and water from Japan's crippled Fukushima Dai-ichi nuclear complex does not pose a health threat outside the evacuation zone around the plant, which now stands at 12 miles.