Racial dilemma in the US

Five white police officers were killed and seven other people were wounded in an attack by a gunman during a protest rally in Dallas, the United States, against police brutality toward African-Americans.

The suspect, who was killed by police, was 25-year-old Micah Johnson, an African-American, who was cited by police as saying he wanted to kill white people, especially white police officers.

A series of cases in the US in recent years involving white police officers fatally shooting black men has escalated tensions between African-Americans and white society. The fatal police shootings of two black men, Philando Castile in Minnesota and Alton Sterling in Louisiana, had prompted Friday's protest march.