Red Line trains were temporarily rerouted to the elevated tracks between the North Side and Chinatown after a report of a person on the tracks Tuesday afternoon.Underground trains between Fullerton and Cermak/Chinatown were running on the elevated tracks between around 3 and 4:30 p.m. due to a person on the tracks at the Washington Street stop, according to the Chicago Transit Authority.Trains are running with minor delays at Washington, the agency said.Shuttle buses were provided in both directions while the trains were being diverted, the CTA said.No other information was available.