Parts of campus were plunged into darkness Sunday night around 10:30 p.m. after a power outage that lasted around an hour and a half struck main and central campus.

According Campus Police emergency personnel, Facilities is investigating the cause of the outage, which mostly affected areas east of Dan Allen Drive.

The power was restored around midnight, but students were still left in the dark as to the cause of the outage.

“I was driving on campus and I realized the streets are really dark,” Amanda Davis, a sophomore in accounting who lives in Carroll, said. “I had to walk back to the dorm in the dark and I thought we were going to get killed because of the muggings [that occurred earlier in the month].”

“I don’t know much of anything,” Stephen Shivley of Student Patrol said. “They don’t tell me much.”

University Housing employees declined to comment.

“The Resident Advisors in Carroll told us to get out of the building; then five minutes later RAs in Owen said to go back inside,” Ian Willard, a senior in physics, said. “I think no one really knows what’s going on — but at least they’re trying.”

Student Patrol and Campus Police walked the premises with flashlights to make sure the situation was under control.

During the outage, students threw water balloons from the dorms and toilet papered the trees and the stairwells.

George Benzhozer was standing in front of Metcalf when he was hit by a water balloon.

“I am seeking revenge for whoever threw the water balloon at me from Metcalf,” he said.

Many students gathered at Tucker Beach with light sticks and flashlights, some playing guitars and singing and others cheering and singing the fight song. Some fired fireworks, two students had lightsaber duals and several students streaked from Bowen to Owen Hall.

Nathan Cox, a junior in biomedical engineering who lives in Carroll, said he was in his dorm doing homework when the lights flickered about 30 seconds before the power went off.

“At first I thought I was going to have to get the light replaced,” Cox said.

Tyler Kotkin, a freshman in business management, said he saw the power in the C-Store and Alexander Hall go out, turned and saw Carroll, Metcalf and Bowen go out.

According to Seth Short, a senior in aerospace engineering, the lights in Wolf Village dimmed and then came back on.

Campus Police emergency personnel said their building also lost power momentarily, until their generators activated.