(CBS/AP)  

 

Updated at 12:34 p.m. ET

 

 

TOKYO - A spike in radiation levels in Tokyo tap water spurred new fears about food safety Wednesday as rising black smokeforced another evacuation of workers trying to stabilize Japan's radiation-leaking nuclear plant.

 

Radiation has seeped into vegetables, raw milk, the water supply and seawater since a magnitude-9 quake and killer tsunami crippled the Fukushima Dai-ichi power plant nearly two weeks ago. Broccoli was added to a list of tainted vegetables.

 

CBS News correspondent Bill Whitaker reports that the U.S. became the first nation to order a block on Japanese dairy and other produce from the region. Hong Kong officials later followed suit.