President Barack Obama said he has dispatched Attorney General Eric Holder to meet with federal and local authorities in Ferguson, Missouri, where the shooting of an unarmed black teenager by police has sparked days of protests and violence.

Obama again urged calm in Ferguson, where protesters have taken to the streets daily for the past week calling for the police officer who killed 18-year-old Michael Brown to be charged with murder.

"It's clear that the vast majority of people are peacefully protesting," Obama said at the White House. "A small minority is not."