via: The Daily Mail

A 12-year-old boy has become the fourth suspect to be arrested for an alleged plot to kill Baton Rouge cops in revenge for the fatal Alton Sterling shooting.

Louisiana State Police said the arrests were made after they received information about a ‘substantial, credible’ threat.

Tensions are high between police and civil rights protesters following the fatal shooting of two back suspects by police officers, and the mass shooting of five cops at a Dallas demonstration on July 7.

Today another Baton Rouge cops were killed, and six were injured in another mass shooting. The shooter, who was wearing black, was seen firing indiscriminately at around 9am.

A suspect, a black man from Missouri, has been shot dead and police say two others may be at large following what appears to have been an ambush.

Three officers have been confirmed dead. Four more have been injured and one is in a critical condition in hospital.

A 12-year-old boy has become the fourth suspect to be arrested for a plot to kill Baton Rouge cops in revenge for the fatal Alton Sterling shooting. Pictured are other suspects Antonio Thomas, 17, (left) and Malik Bridgewater, 20 (right)

Police uncovered the plot while responding to a burglary at a Baton Rouge pawnshop on Saturday morning, July 8.

Authorities said surveillance video showed the suspects using a ladder to climb the roof of the building to get in.

Officers arrested one suspect, Antonio Thomas, 17, at the scene with a handgun and a BB gun. Another suspect, Malik Bridgewater, 20, was apprehended the next day on July 9, and a third suspect, a 13-year-old boy, was apprehended on a street.

The 12-year-old was arrested a few days later on July 15.