The Minnesota police officer who was acquitted in last year's fatal shooting of black motorist Philando Castile will receive $48,500 as part of a separation agreement.

A suburban police officer likely wouldn’t have shot dead a black motorist if he had been white, Minnesota’s governor has said, joining the national debate in the US over how law enforcement treats black people.

US police have made one arrest after bottles and rocks were thrown by a rogue group of protesters in Minnesota.

A band of about two dozen men armed with AK-47s and wearing bullet-proof vests stormed the State Ministry of Police headquarters in Matamoros, Mexico, and freed a man who had been detained in a kidnapping investigation.