Alton Sterling murder
© Baton Rouge Crime / YouTube
The shocking and graphic video of Baton Rouge police officers killing African-American Alton Sterling has sparked outrage across the country and protests in the streets of Louisiana's capital.

Sterling was shot dead while pinned to the ground by police. Officers say they were called to a convenience store after an anonymous caller claimed a man selling CDs had threatened him with a gun.

Warning: Graphic video

The store's owner Abdul Muflahi told local station WAFB Sterling was tased by one officer and tackled by another before he was shot "four to six times."

Muflahi said Sterling was not holding a gun at the time, but that he saw officers remove a gun from his pocket after he was shot.

The 37-year-old man was dead before paramedics arrived at the scene.

Protesters took to the streets of Baton Rouge last night chanting "Black Lives Matter" and "No justice, no peace." Speaking to The Advocate, one protester said he came out because he felt frustrated, saying "Once it starts hitting where you live, you start feeling the fear."

Twitter and Facebook was also flooded with grief and anger including Anonymous and prominent black artists who have been outspoken on the issue of police violence.

A rally is planned for outside city hall on Wednesday morning.