BREAKING: Video showing fatal confrontation emerges after Tuesday morning shooting by Baton Rouge officer

Alton Sterling, 37-years old, was shot and killed by a Baton Rouge police officer Tuesday morning outside a convenience store on North Foster Drive after an altercation with two officers.

Around 12:35 a.m., Baton Rouge police responded to the Triple S Food Mart at 2112 N. Foster Drive after an anonymous caller indicated that a man in a red shirt who was selling CDs outside the store pointed a gun at someone, said Baton Rouge Police Department spokesman Cpl. L'Jean McKneely.

A disturbing 48-second cellphone video captured by a bystander shows an officer fire at least one round into a man's chest, followed by the sound of at least four more shots that were not seen in the video.

East Baton Rouge Parish Coroner William "Beau" Clark said initial results of an autopsy performed Tuesday indicated that Sterling died due to a homicide and suffered gunshot wounds to the chest and back.

Police were releasing few details about what led up to the shooting.

"This is an ongoing investigation," said McKneely. "We're going to review the video, we're going to review the audio. We have witnesses, non-biased witnesses here. We're going to bring them down to our station and interview them."

The two officers in the incident, who have not been identified, have been placed on administrative leave.

WARNING: The Video Contains Graphic Footage.