One of the sons of imprisoned drug lord Joaquin "El Chapo" Guzman is among the half-dozen men abducted by gunmen at a restaurant in the Mexican beach resort of Puerto Vallarta.

The Brazilian mother-in-law of Formula One supremo Bernie Ecclestone has reportedly been kidnapped in São Paulo and is being held for a ransom of $36.5m (€32m).

The Islamic State group has released the last of some 230 Assyrian Christians kidnapped a year ago in Syria after receiving millions of dollars in ransom, Christian officials said.

Nigeria’s counter-insurgency spokesman says the military is focusing on a north-eastern forest where officials believe more than 200 schoolgirls kidnapped a year ago are being held.