American experts are expected to arrive Tuesday at a Mexican coal mine where 65 miners are trapped.
Officials say it's unlikely the miners are still alive but there is still a chance of finding survivors. Rescuers have been working their way through rock and debris since an explosion ripped through the mine Sunday.
President Vicente Fox's top spokesman says the government "stands in solidarity with the families" of the miners. A man whose brother and cousin are trapped says "people are starting to get desperate."
Catholic priests and Protestant ministers have been leading the crowd in prayer.