RALEIGH — Two reports this week of possible men with concealed guns on the campus of N.C. State University stemmed from students playing a game called Humans vs. Zombies that has become a phenomenon on U.S. college campuses in recent years, university police said today.

“… Police have determined that both reports of individuals on campus who might be carrying handguns were related to the Humans vs. Zombies game, and that there was no threat to campus,” according to a N.C. State campus police department news release. “Both incidents were related to the same individual, who contacted police after hearing the descriptions and locations,” police said in a statement.

They did not identify the student. Though it was a game, police said they “thank those individuals who witnessed suspicious behavior and contacted authorities.”

The game has become so popular that it has its own website, humansvszombies.org, describing the game as “Humans vs. Zombies (HvZ) is a game of moderated tag played at schools, camps, neighborhoods, military bases, and conventions across the world. Human players must remain vigilant and defend themselves with socks and dart blasters to avoid being tagged by a growing zombie horde.”