Ames, Iowa ? An Iowa State University fraternity has been stripped of its charter because of pranks after a Kansas State football game last fall.

Two Delta Sigma Phi fraternity members and a pledge harassed Kansas State sorority members on the telephone after the game in Manhattan, Kan., students said.

The telephone conversation included “a rude way of asking them to come over to their chapter house to party,” said Andy Klobnock, an ISU senior and president of the Delta Sigma Phi chapter.

Klobnock added, “It wasn’t anything sexual.”

University officials de-scribed the incident as more serious.

Klobnock and university officials would not elaborate or identify the fraternity members.

The men also sprayed a fire extinguisher and stole items from the Delta Sigma Phi fraternity’s house at KSU.

The three fraternity members were kicked out of the chapter house last fall. But members of the fraternity’s Kansas State chapter told ISU administrators, who suspended the ISU chapter for one year.

Last week, Delta Sigma Phi’s national headquarters revoked the fraternity’s charter.