Thieves robbed a Ugandan children's choir on tour in Chicago for a second time this week, just three days after laptops, video equipment and a passport were stolen from the choir's van while it performed in a West Side church.

The group of 20 Ugandan orphans is touring the U.S. to raise money for their school and orphanage in Uganda. The laptops stolen from their van contained pictures of their parents and families, many of whom died of AIDS.

Carrie Harless, tour director for the SIFA African Children's Choir, said the spare tires were worth about $400 each, and were bolted fast beneath the vans when the choir arrived in Chicago last week. Harless said she didn't know exactly when the tires were stolen.

The children have been hard hit by the robberies. "I am very sad because we don't have any idea where we are going next," said Rachel Nakabuye, an orphan from the choir.

After seeing a report about the first robbery, Timothy Rand, president of Midway Airport Concessions, donated $10,000 to the choir, which plans to build a orphanage named after Rand's father. On Tuesday, the choir received an additional $5,000 check from the Steans Family Foundation.

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The Associated Press contributed to this report.