A hoax SMS warning that radiation from Japan would reaching other Asian countries spread panic in Philippines, Thailand, Malaysia and Singapore.
The text message claimed to be a news flash from BBC news, advising people to remain indoors.
It read: "Japan govt confirms radiation leak at Fukushima nuclear plants. Asian countries should take necessary precautions."
"If rain comes, remain indoors first 24hrs. Close doors & windows. Swab neck skin with betadine where thyroid area is, radiation hits thyroid first.
"Take extra precautions. Radiation may hit Phillipines at startng 4pm today."
The hoax originated in the Philippines and spread like wildfire through social networking sites such as Facebook and Twitter.
Nuclear experts in the Philippines debunked the rumour.
In a statement, the Philippine Nuclear Research Institute (PNRI) said radiation levels in the Philippine atmosphere were normal as of Monday (March 14) and showed "no increase" since the nuclear plants in Fukushima reported sustaining damage in their reactors.