A bookstore rivalry was interrupted by Kansas University police Thursday, after someone in a limousine threatened to kill a bookstore worker, police said.

“The altercation stemmed from two rival bookstores attempting to get customers for the book buyback period,” a police report said. During finals week, which ends today, bookstores buy students’ used books.

University Book Shop, a private book store near 23rd Street and Naismith Drive, had rented a limo and was giving students rides for selling back their books, said Capt. Schuyler Bailey, KU Public Safety Office spokesman.

A passenger inside the limo “threatened to kill a man standing outside the limo, if he didn’t stop following them,” police said. Police said the criminal threat occurred at 5:50 p.m. Thursday, outside KU’s Lewis Hall, 1530 Engel Road.

Bailey said the victim, who reported the incident, was a worker at KU Bookstore, the university’s official bookstore, located inside Memorial Unions, 1301 Jayhawk Blvd.

No arrests were made in the case, because the victim wasn’t able to identify who made the threat, said Bailey.