CLEVELAND (AP) _ A gunman in camouflage opened fire Friday inside the Case Western Reserve University business school, wounding at least two people and sending students and faculty scrambling to get out. An unknown number of people were trapped in the building, too fearful to move.

Police sealed off the Peter B. Lewis Building and the man was still firing 90 minutes after the shooting began, school spokeswoman Marcie Hersh said.

One person was taken to a hospital with a gunshot wound, she said. The other wounded person remained inside the building.

A students who escaped, Sachin Goel, 26, was standing outside the building's cafeteria with two friends when the gunman approached and opened fire. One of his friends screamed as he was hit, and the others dove for cover under a table.

``He couldn't get us. And then he again shot as we turned the table and put it in front of us,'' Goel said.

Police said the man was believed to be wielding a high-powered rifle.

``He had a machine gun, book bag, camouflage shirt, military green hat, white pants and a book bag,'' said LeKisha Spencer, 28, who works in a first-floor cafeteria. ``He was just walking, aiming his guns and firing.''

Among those who locked themselves inside the building was Dick Bennett, director of development at the Weatherhead School of Management.

``We believe the shots are coming from the first floor,'' Bennett said by telephone from a third-floor room with eight other faculty members.

Finals were completed last week and fewer than 10 percent of the 1,600 students at the business school were inside the building when the shooting began, Bennett said.

Administrative assistant Bonnie Copes, 50, was locked in a department office inside the building. She said she was unable to leave _ and was still hearing gunshots.

``Rounds and rounds and rounds,'' she said.

Case Western has 9,500 students. The $62 million Lewis building, designed by Frank Gehry, opened last fall and is about five stories high. Instead of walls on the south side, it has a curving roof, made of 20,000 stainless-steel shingles, that seemingly tumbles to the ground.

It is named for the billionaire chairman of Progressive Insurance, who gave Case $37 million toward construction of the building.

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On the Net:

Peter B. Lewis Building: http://www.weatherhead.cwru.edu/pbl

Case Western Reserve University: http://www.cwru.edu