Fire crews responded last night to a house fire in Tuolumne City.
The location was on the 18-thousand block Oak Street at Elm in Tuolumne.
As they arrived, they found a working structure fire but no one was home at the time.
The residents have not been identified yet.
The cause and damage estimates are still being investigated.
Units from the CDF, Tuolumne Fire Protection District, Twain Harte, and Columbia all responded last night to the blaze.