The US president says peace efforts are "very much on track", a day after Russia's president declined to agree a full ceasefire.

Police have been searching for the missing University of Pittsburgh student, who was on spring break in Punta Cana, for the past two weeks.

Colombia’s Ecopetrol polluted hundreds of sites, including water sources and wetlands, the BBC finds.

Experts release this year's World Happiness Report - which also ranks the world's happiest countries.