SEFFNER, Fla. (AP) — Crews with heavy equipment have begun the demolition of a Florida home over a huge sinkhole where a man is presumed dead after being swallowed by the earth.

The search for Jeff Bush, 37, was called off Saturday, and a heavy machine with a large bucket scoop was moved into position Sunday. The 20-foot-wide opening of the sinkhole was almost covered by the house, and rescuers said there were no signs of life since the hole opened Thursday.

Jeremy Bush, the man who tried to save his brother, was escorted with a woman by a deputy to the front of the house early Sunday before equipment moved into position. He repositioned some flowers from a makeshift memorial to a safer location, where Bush and the unidentified women knelt in prayer.