Security in Chicago was increased after it was revealed that a Chicago man issued a death threat against Chicago native and Boston Celtics guard Tony Allen, the Boston Globe and Yahoo! Sports reported on Thursday.

The Celtics and Bulls had extra security around their benches during Game 3 of a first round playoff series to keep an eye on Allen.

Sources said that Allen had received threats in Chicago for some time now. A former Chicago Crane High star was also threatened prior to a March 17 game at Chicago. He didn't make the trip because of a thumb injury.

"It's a private team matter," Celtics president Rich Gotham told Yahoo! Sports. "It's just not something that we are going to talk about."