OAKLAND, California– It started out as a routine traffic stop, but by the end of the day 3 police officers were dead and one remains in Critical conditon.

Lovelle Mixon, 26, was pulled over by police early Saturday afternoon during a traffic stop. Mixon, who was wanted for violating his parole, opened fire on the officers, killing one and seriously injuring another.

Mixon then fled the scene on foot, and thanks to an anonymous tip, was later located at an apartment building. When the SWAT team forced their way into the apartment where Mixon was holed up, Mixon began firing and killed two members of the SWAT team. According to police, a bullet grazed another officer.

Police returned fire and Mixon was killed. Governor Arnold Schwarzenegger, in a statement released, had this to say:

“All four officers dedicated their lives to public safety and selflessly worked to protect the people of Oakland. Our thoughts and prayers are with the families of those lost, the Oakland Police Department and law enforcement officers throughout California during this difficult time.”

It has been said that tension has been high between the Oakland Community and the police department ever since the fatal shooting of an uarmed man named Oscar Grant. Grant was shot by a transit police officer at an Oakland train station on January 1.