NEW HAVEN, Conn. (AP) _ A lighting fixture fell moments before cellist Yo-Yo Ma was to perform at Thursday at Yale University, injuring three people.

``We heard a big boom and then someone crying,'' said Katie Phang, 19, a Yale sophomore.

``At first there was silence, and then a woman yelled `help me,''' said Dee Koviello, 44.

Two people were treated for head cuts at a hospital. One was released, the other was still being evaluated, said Yale-New Haven Hospital spokesman Tom Urtz.

The third injured person left the hall without help, university officials said.

The lighting fixture, a free-standing 7-foot-tall track light with two rows of spot and flood lights, tipped over in Woolsey Hall before the 18-time Grammy winner was to begin performing.

The concert began about 40 minutes late.

The concert was held to benefit the Aldo Parisot Scholarship Fund and was attended by about 2,300 people.

Parisot, a member of the Yale School of Music faculty since 1959 who conducted the performance, established the scholarship in January 1994 to attract cellists from around the world.