U.S. investigators searching for Canadian Olympian-turned-fugitive Ryan Wedding have zeroed in on a region in central Mexico, CBC News has learned.

The FBI said it has launched a social media campaign seeking to elicit tips on Wedding's whereabouts from residents of the state of Mexico, which surrounds the capital, Mexico City, to the west, north and east.

"We believe that there are potentially people in that area who have information about his whereabouts," FBI spokesperson Laura Eimiller told CBC News.

She declined to say whether agents believe Wedding is hiding in the region. "I think it's self-explanatory why we have concentrated our efforts there," Eimiller said.

The FBI's announcement amounts to the first public acknowledgement that its agents are focusing efforts on a specific a

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