to the 82nd airborne division of the us army. russia has massed more than 100,000 troops on its border with ukraine, but moscow denies that it's planning to invade. the authorities in the mexican state of zacatecas are investigating the murder of 16 people whose deaths are thought to be linked to an intensifying struggle between drugs gangs. ten of the bodies were found dumped in a street in the city of frensillo with messages attached to them. hundreds of people in rio dejaneiro have demonstrated next to a seafront kiosk where a congolese migrant was murdered last month. moheez kabagambay, who worked at the kiosk, was tied up and beaten to death after complaining about unpaid wages. his ordeal was captured by a security camera. demonstrators called for a full investigation and the arrests of everyone involved. authorities in peru have authorised the spanish company, repsol, to reopen a refinery that closed after a huge oil spill.