Scientists are calling for urgent action to halt the spread of a pest that is destroying maize crops since it is spreading rapidly across Africa.

Donald Trump has said a "big day" is planned on national security, including an announcement to build a wall on the border between the US and Mexico.

Adama Barrow has been sworn in as the Gambia’s new president. Barrow took an oath of office in the country’s embassy in Senegal on Thursday and immediately called on security forces to demonstrate their loyalty in his standoff with defeated leader Yahya Jammeh.

Images of an emaciated elderly woman have rattled Chinese social media users, after papers in the southern Guangxi region reported that the 92-year-old had been kept in a pigsty by her son and daughter-in-law "for years".