LONDON (Reuters) - British authorities hunting the source of an outbreak of infectious foot and mouth disease focused their investigation on Sunday on two research labs located just miles from where a herd of cattle was infected.
While there was no confirmation the research sites were the source of the infection, both high-security labs -- one run by the government's Institute for Animal Health and the other by a pharmaceutical company called Merial -- were sealed off and placed within a 10-km radius exclusion zone.