Three law enforcement officers were killed in Baton Rouge Sunday during an ambush-style attack carried out by a Missouri man.

The officers killed in the attack, which occurred near a gas station, are Montrell Jackson, 32, and Matthew Gerald, 41 from the Baton Rouge Police Department and Brad Garafola, 45, with the East Baton Rouge Sheriff's Office. Three additional officers were injured in the attack. 

The shooter has been identified as Gavin Long of Kansas City, who died at the scene. Long, who was African American and a Marine, attacked police on his 29th birthday.

The attack comes on the heels of the July 5 fatal police shooting of Alton Sterling in Baton Rouge and the fatal police shooting of Philando Castile in Minnesota one day later. The deaths of Sterling and Castile sparked nationwide protests over police violence. That same week, five police officers in Dallas were fatally shot by a sniper at the end of a protest in that city.

In response to the Sunday shootings in Baton Rouge, President Barack Obama said "attacks on police are an attack on all of us."

"The death of these three brave officers underscores the danger that police across the country confront every single day," the president said. "We as a nation have to be loud and clear that nothing justifies violence against law enforcement. Attacks on police are an attack on all of us and the rule of law that makes society possible."

Chicago Mayor Rahm Emanuel also reacted to the shootings: "As yet another horrific event unfolds in Baton Rouge today, it is painfully clear that our nation must come together. We must rise above the senseless violence that seeds hate at the very time we need to build unity. We must move beyond words and declarations and work towards mutual respect and trust. While it may be difficult, we can achieve it together. That is the American way, and it must be our path forward."

In Chicago, police have been working in pairs since the attack on police in Dallas and will continue to do so in light of the shootings in Baton Rouge.