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Boston Marathon

Foursquare founder apologizes for fake Boston Marathon bib

Foursquare founder Dennis Crowley (foreground) said he didn’t mean to cause any harm by duplicating a registered runner’s bib number.

Bryce Harper For The New York Times/File

Foursquare founder Dennis Crowley (foreground) said he didn’t mean to cause any harm by duplicating a registered runner’s bib number.

Dennis Crowley, the founder of the social media site Foursquare, wrote a public apology on WCVB’s website after causing an outcry when his wife, Chelsa, was spotted running the Boston Marathon with another runner’s bib number.

Kathy Brown of Framingham, a registered marathon runner, logged on to a website to see pictures of her running on Monday.

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Brown told WCVB, “I opened it up looking for the pictures of me and there were some in there and they came out really good, but then I saw this other woman. It was pretty easy to figure out that someone just made a fake bib.’’

Crowley, a Medway native, wrote, “Using a duplicate number to get Chelsa into the starting corral with me was wrong.’’

He said he and his wife ran Boston last year and were separated when the bombs went off.

“Our intent was never to ‘steal’ anything from anyone — our intent was to finish the Boston Marathon together as we tried to do last year,” Crowley wrote.

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