During Thursday night's blowout win over the Bulls, security was increased around both benches due to a death threat issued to Celtics guard Tony Allen. From ESPN.com: (http://sports.espn.go.com/nba/news/story?id=4094591)The Celtics and Bulls had extra security around their benches during Game 3 of the first-round playoff series to keep an eye on Allen. A source said the added security presence was a precautionary measure, according to the Globe.Allen, who is from Chicago, played nine minutes on Thursday night and did not score in the team's 107-86 win against the Bulls.Sources told the Globe that Allen has been receiving threats in Chicago for some time. Allen also was threatened prior to a March 17 game at Chicago. He didn't make that trip, however, because of a thumb injury."Is that what you're going to write about? Is that what you're going to write about?" Allen said when asked about the threats, then walked away, the Globe reported."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."Celtics coach Doc Rivers told the Globe: "It's a team matter. We will keep it in house."The NBA also declined comment to Yahoo! Sports.In April 2007, Allen was found not guilty of aggravated battery in a Chicago court. That charge was connected to a fight in August 2005 outside a Chicago restaurant.