A 6-year-old boy collapsed and died while running a one-mile race with his parents Wednesday in Westminster, authorities said.

Connor Smith, 6, of Tridelphia Road in Howard County, went into cardiac arrest during the Main Street Mile in downtown Westminster, the Westminster Volunteer Fire Company said. He was transported to Carroll Hospital Center, where he was pronounced dead.

The boy had no known allergies, no past illnesses and no previous surgeries, authorities said. The state medical examiner will perform an autopsy.