CHICAGO (AP) — The Italian-born conductor of the Chicago Symphony Orchestra has dedicated a performance of a Bach composition to the victims of the Boston Marathon bombings.

Riccardo Muti told an audience at a regularly scheduled concert at Symphony Center Tuesday evening that the world is shocked by the attack.

He added the Bach Mass in B Minor about to be performed ends with Latin words that mean, "Give us peace." And he said Bach didn't have in mind just eternal peace — but also peace on earth.

Before turning to begin the piece, Muti asked musicians and the more than 2,000 in the audience to stand for a moment of silence for the victims.

The 71-year-old Muti was the longtime head of Milan's La Scala. He's been CSO's music director since 2010.