A 79-year-old man has been charged with murder of an 18-year-old woman who was stabbed more than 120 times in her suburban Chicago home almost six decades ago.

Bodies have been found in the search for two Australian brothers and a US tourist who went missing in northern Mexico.

Diplomatic relations between India and Canada have been at their lowest since Prime Minister Justin Trudeau responded to the killing of a Canadian citizen and Sikh separatist leader saying there were "credible allegations" India was involved.

Countries in South and Southeast Asia have been coping with a weeks-long heatwave which has seen record temperatures sweep parts of the region.

China has been branded "a bully" and an international lawbreaker after its ships blasted Philippine vessels with water cannon in the South China Sea.

Heavy rains in southern Brazil have killed 57 people, local authorities have said, with dozens still unaccounted for.