Spain has woken to flags at half staff on Tuesday as the nation began three days of mourning for the victims of the deadly train accident in the country’s south, while emergency crews continue searching for possible bodies. The official death toll of Sunday’s accident rose to 40 by late Monday. But officials warned that that count may not be definitive. Interior Minister Fernando Grande-Marlaska told Spanish national television RTVE late Monday that searchers believe they have found three more bodies still trapped in the wreckage. Those bodies are not included in the official death count.

The World Economic Forum’s annual meeting attracts corporate executives, academics, philanthropists and media to the Swiss Alps town of Davos. The Geneva-based think tank first hosted the event in 1971 with the goal to improve European management. Beginning Tuesday, 850 CEOs and chairs of the world’s top companies are expected to be among 3,000 participants from 130 countries in the Alpine resort. The dialogue, debate and deal-making is scheduled to last through Friday. U.S. President Donald Trump’s third visit to Davos as president comes as U.S. allies worry about his ambition to take over Greenland, among other international crises.