UPDATED 09/26/11 5:34 a.m.

EVANSTON, Ill. (CBS) – Northwestern University has issued an alert after one of its students was attacked and pistol-whipped by two men just off the Evanston campus over the weekend.

As WBBM Newsradio’s Lisa Fielding reports, the male student was walking north on Orrington Avenue at Simpson Street at about 12:15 a.m. Sunday when two men ambushed him from behind, the university said in the alert, which was posted online.

LISTEN: WBBM Newsradio’s Lisa Fielding reports

One of the assailants placed the student in a bear hug, and the other displayed a handgun.

The men demanded the student’s wallet. When he told them he didn’t have one, the gunman used the weapon to strike the student on the head, the university alert said.

The other man, who was holding the victim, then pushed him to the ground.

The men ran off and got into a waiting vehicle, which sped off, the student later told police. He declined medical treatment.

The victim described the two suspects as black males in their 20s, each about 6 feet tall, the alert said.

The man who was carrying the handgun had a medium build, and wore dark-colored baggy jeans, a dark-colored hooded sweatshirt, and a baseball cap. The second man was heavy-set, and wore dark-colored baggy jeans and a dark, hooded sweatshirt.

Northwestern reminds students that shuttle bus service provides transportation to areas both on and off campus every night until 3 a.m. In addition, SafeRide provides free rides at night.

Northwestern police also ask the community to report suspicious activity immediately to University Police or Evanston Police by dialing 911 or by using a Blue Light emergency telephone.

Anyone who might have information regarding this incident is asked to contact Evanston police, at (847) 866-5000.

The Sun-Times Media Wire contributed to this report.

Watch & Listen LIVE