You win some, you lose some — you riot either way.

Post-game bedlam has been erupting on campuses around the country, leaving police and college officials scrambling to implement new security measures to break the cycle, which they say has been growing more violent, and more commonplace.

On Monday, thousands of fans at the University of Maryland, College Park, faced off with hundreds of police after the Terrapins won the NCAA Men's Basketball Tournament.

"This is a trend, but not just at College Park. It's a national phenomenon," said Maj. Cathy Atwell of the College Park campus police. "It's been increasing over the last two years or so."

The raucous scenes Monday in College Park — bonfires, looting, drunken brawls, flying beer bottles and walls of troopers in riot gear — were still milder than damage Maryland fans caused last year after losing to Duke in the NCAA Final Four.

In Arizona, Tucson Police Sgt. Marco Borboa said he had flashbacks when he saw pictures of the College Park mob scene in Tuesday's newspapers.

"Those photos could've been taken here," he said.

The chaos Borboa remembers followed the University of Arizona's NCAA championship loss to Duke last spring. That night, rowdy Wildcats fans smashed out storefronts, attacked police, set fire to trash cans and even burned a mobile home.

The episode, which resulted in at least 17 arrests, replayed many of the same problems the city suffered when Arizona beat Kentucky to win the championship in 1997.

"This year we had no incidents, but it looks like other campuses are being faced with it now," Borboa said. "The problem is that it becomes a tradition. Once you have one or two incidents, it becomes the tradition that this is the place to gather, and that becomes well-known. It's tough to break the cycle."

Atwell pointed to similar problems in recent years at universities like Michigan State and Ohio State. "Even Indiana had some unrest last night," she said Tuesday.

Bloomington, Ind., police reported that after the Hoosiers lost to Maryland Monday, a crowd of thousands of Indiana fans grew unruly, throwing bottles, ripping plywood off buildings and lighting fires.

The roughly 130 riot gear-clad city and state troopers in downtown Bloomington resorted to using tear gas and pepper spray to disperse the mob.

Lt. Jerry Minger, of the Indiana University campus police, said most of the rabble-rousing occurred downtown, and that things had stayed comparatively peaceful on campus. Yet even campus cops wound up making about 20 arrests that night, adding to the 10 or 15 reported by city police.

"Part of this is a copy-cat phenomenon," said Sheldon Steinbach, general counsel for the American Council on Education.

Steinbach, who has observed student riot behavior for several decades, said campus sports rioting traces back to high-profile episodes of violence following professional sports games like the World Series, Stanley Cup and the Superbowl.

"It sets up a pattern for other revelers to mimic," he said. "Reactions in various towns for professional sports events have set the pattern. . . . It's behavior fueled by excessive alcohol consumption, and with that comes somewhat of a herd mentality."

Jeff Kretschmar, of the Miami University Sport Fan Research group in Ohio, agreed, noting that young people often learn the ins and outs of mob behavior from television.

"After the game, you get people outside in a group who've been drinking all day, feeling cohesion in the group," Kretschmar said. "What happens is, the person in the group feels anonymous, and their actions feel unidentifiable. So they feel more free to do these things."

For that reason, police are wise to start using video surveillance of crowds to "wake up" fans from their mob mentality, he said.

Borboa said police in Tucson and other university towns are starting to observe one another and trade tips about crowd control in preparation for the next unruly event.

"We're all trying to learn what works — and what doesn't," he said.

George Cathcart, spokesman for the University of Maryland, College Park, said colleges are fine-tuning their responses as well. The school recently expanded its code of conduct to allow students to be disciplined for misdemeanors committed off-campus. Previously, only off-campus felonies were covered.

Cathcart said he was optimistic that more and more students are rejecting the riot tradition. He admitted, however, it's still a liability that comes with increased success and attention in school sports. Having also sent its football team to the Orange Bowl this year, Maryland has had its share of problems with disorderly crowds lately.

"It happens at schools with really good sports teams," Cathcart said. "But it's certainly not a badge of honor any of us want to wear."

Capital News Service contributed to this report.