LUOSHUI TOWN, China (AP) — Troops dug burial pits in this quake-shattered town and black smoke poured from crematorium chimneys elsewhere in central China as priorities began shifting Thursday from the hunt for survivors to dealing with the dead. Officials said the final toll could more than double to 50,000.

As the massive military-led recovery operation inched farther into regions cut off by Monday’s quake, the government sought to enlist the public’s help with an appeal for everything from hammers to cranes and, in a turnabout, began accepting foreign aid missions, the first from regional rival Japan.

Millions of survivors left homeless or too terrified to go indoors faced their fourth night under tarpaulins, tents or nothing at all as workers patched roads and cleared debris to reach more outlying towns in the disaster zone.