Eagles quarterback Michael Vick has canceled several book signings due to threats of violence against him, Philadelphia-based TV station NBC10 reported on Monday.
Safety concerns led to signings of his new book "Michael Vick: Finally Free" being canceled at Barnes and Noble bookstores in Atlanta, New Jersey and Exton, Pennsylvania, the TV station said. The threats also extended to Vick's family members and store employees.
Vick family spokesman Chris Shigas told NBC10 that police were investigating and he believed the threats were real.
"This was a joint decision between Michael Vick's advisers and the publisher," Shigas said. "They were canceled because of a recent uptick in credible threats of violence against Michael Vick, his family, the bookstores and the bookstore employees."
Vick joined the Philadelphia Eagles in 2009 after spending 19 months in prison for running a dogfighting operation.
Shigas said the threats included posts on Vick's Facebook page.
"There just seemed to be a collective, very few extremists who were noting the time and the place where these events would be," said Shigas. "They were working to gather support to commit acts of violence. They wrote and said disgusting things, including going after his fans with words of racism, including the N-word.
"We're going to work with authorities and we're confident that they're taken the threat seriously and that they'll investigate it."