Chicago police said they are conducting a death investigation after a person was found dead at about 5:30 a.m. in the 6300-block of South May Street.
Service on the Green Line was temporarily suspended between Garfield and Ashland/63rd before resuming with residual delays after 7 a.m.
Meanwhile on the Blue Line, service had been temporarily suspended between O'Hare and Harlem before resuming shortly after 7 a.m.