The latest incident happened just before 8 a.m. Tuesday when a rock was used to break the glass of an information board in the lobby of Goodbody Hall, which houses the school's Jewish studies program, police said.

Less than an hour earlier, a rock was thrown through an upstairs window of the Chabad House at 518 E. 7th St., a Jewish student center, police said.

Two women were in the apartment at the time, but they were not injured.

"I heard a large crash. I thought my roommate had dropped something in the kitchen," said resident Rachel Schend. "She said, 'Did you see it? Did you see it?' And there was a large rock in our living room."

Tuesday's incidents come after rocks were thrown through windows at the Chabad House and the Hillel House, another Jewish student center near campus, at about the same time Saturday, 6News' Rick Hightower reported.

The same day, staff members at the Wells Library reported vandalism to a number of Hebrew-related books which had been removed from shelves and taken to restrooms on several different floors.

The incidents happened days before Hanukkah, leading Jewish leaders to believe someone is intentionally targeting them because of their faith.

"He wanted to hurt someone, because it was early in the morning, he saw the light and that there was somebody here doing something and he threw the rock," said Rabbi Yehoshua Chincholker, talking about the most recent incident at the Chabad House. "I'm worried about this girl that was sitting here, and I'm worried about my students who are going to come for our programs."

IU police were looking Tuesday for a man who was seen a short time after the vandalism at Goodbody Hall walking outside nearby Ballantine Hall.

The man was described as white, between 40 and 50 years old, 5 feet 8 inches tall with grayish-blond hair and a gray beard. He was wearing a yellow jacket over a hooded sweatshirt and off-white pants, police said.

"Because the acts appear to be motivated by animosity towards a particular religion, the FBI and the U.S. Department of Justice have also been notified," IU Police Chief Keith Cash said in a news release.

Anyone with information about the vandalism is asked to call IU police at 812-855-4111.