US President Barack Obama is cutting short a trip to Europe to travel to Dallas in the wake of the recent attack.

5 police officers were killed in the sniper attack on Thursday night.

Police have found bomb-making material, bullet-proof vests and guns at the home of a man suspected of carrying out the attack.

Micah Johnson, a 25-year-old black Army veteran - had also written a journal of combat tactics.

Today a number of rallies calling for peace have taken place across several states.

One event in Los Angeles was led by rapper Snoop Dogg:

Meanwhile, the Bahamas has issued a rare travel advisory for its citizens visiting the US, recommending particular care for young men in cities affected by tensions over recent police shootings.

The advisory warns citizens to not get involved in protests and avoid crowds.

According to the CIA, some 90% of the Bahamas population is black.