The Roman Catholic church has confirmed that an altar boy was one of two minors killed outside a church on Mexico’s Gulf coast.

The remains, mostly boys aged between two and seven years old, were placed inside a box of ashlars in a careful arrangement.

Shading of text in the year column refers to years in which El Niño (red) or La Niña (blue) events began. Historical values of the ENSO Outlook status prior to 2014 are based on the set criteria alone ...