A conservative website claimed Thursday that Maricopa County Sheriff Joe Arpaio had promised to investigate President Barack Obama’s eligibility to run for re-election.

According to WorldNetDaily, about 325 so-called birthers gathered Wednesday night to sign a petition alleging that Obama planned to use a fake birth certificate to run for office in 2012.

Jerome Corsi, author of Where’s the Birth Certificate?, reportedly presented Arpaio with the petition during a one-hour meeting Thursday.

“Arpaio told the tea-party leaders the complaint is within his jurisdiction, and he will be forced to investigate,” WND wrote. “He said he expects political pressure, but he pointed out that as the chief law enforcement officer of Maricopa County, he’s taken an oath to respond to citizens who approach him about enforcing the law.”

But in a statement Friday, Arpaio had a slightly different version of events.

“What I have agreed to do, contrary to some published media reports, is simply look at the evidence these people have assembled and examine whether it is within my jurisdiction to investigate the document’s authenticity,” Arpaio said.

Watch this video from The Birther Report, broadcast Aug. 18, 2011.

Watch this video on iPhone/iPad