FERGUSON, Mo. — Missouri’s governor today ordered the National Guard to a St. Louis suburb convulsed by protests over the fatal shooting of an unarmed black teen, after a night in which police used tear gas to clear protesters off the streets well ahead of a curfew.

Gov. Jay Nixon said the National Guard would help “in restoring peace and order” to Ferguson, where protests over the killing of 18-year-old Michael Brown by a white police officer entered their second week. Police said they acted in response to gunfire, looting, vandalism and protesters who hurled Molotov cocktails.

“These violent acts are a disservice to the family of Michael Brown and his memory and to the people of this community who yearn for justice to be served and to feel safe in their own homes,” Nixon said in a statement.

The latest confrontations came on the same day Attorney General Eric Holder ordered a federal medical examiner to perform another autopsy on Brown, and as a preliminary private autopsy reported by The New York Times found Brown was shot at least six times, including twice in the head.

As night fell in Ferguson Sunday, another peaceful protest quickly deteriorated and the streets were empty well before the midnight curfew.