Oakland fire officials spent much of Tuesday attempting to rescue a plumber stuck up to his waist by dirt and sand in a 10-foot-deep sewer hole below a residential street sidewalk, but they were unable to extricate the man.

The man, who was working on a sewer line, got stuck in the hole in the 2300 block of 21st Avenue in Oakland. The incident was reported around 12:30 p.m., and he remained in the hole 10 hours later and officials had no prognosis on when he might be freed.