Missouri governor imposes curfew in Ferguson, declares emergency

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Ferguson, Missouri (CNN) -- A SWAT team lined up across from dozens of protesters in Ferguson early Saturday commanding them via a bullhorn to get out of the street and onto sidewalks, or to go home.

Bottles flew back in their direction, and looters broke into at least three stores. Security officers warned that disobeying the law would be met with arrest. Military style vehicles that had previously disappeared form the streets were back out.

Earlier, bangs had filled the air. Possibly gunfire, but a CNN crew on the scene saw no evidence of bullet impacts and had also seen fireworks set off earlier.

The after-dark confrontation began after more than two dozen protesters closed off a section of street near a convenience store that has become part of the case surrounding Michael Brown, the black teen who was killed by police gunfire one week ago.

Friend of Darren Wilson: 'He was scared' Family attorney: Store video 'irrelevant' Chief: Officer maybe saw stolen cigars Thousands of demonstrators march down a street in Ferguson, Missouri, with members of the St. Louis County Police and Missouri Highway Patrol on Thursday, August 14. Days of violent protests finally turned peaceful on Thursday after Missouri Highway Patrol officers took over security in the town. Clashes between angry citizens and St. Louis County and Ferguson police had occurred for several days after Ferguson police officer Darren Wilson shot and killed 18-year-old Michael Brown on Saturday, August 9.Protests in Ferguson, Missouri Police name cop who shot Michael Brown Are these Michael Brown's final moments?

After days of ruckus nightly protests in the Missouri town that were met with tear gas and militarily outfitted officers, peace had returned Thursday along with new security arrangements lead by Missouri State Highway Patrol Capt. Ron Johnson. He has bonded with the community, becoming the figurehead of softer crowd policing.

Protests had been lower-key late Friday, perhaps due to rainfall.

CNN's Greg Botelho reported and wrote from Atlanta, and Don Lemon reported from Ferguson. CNN's Michael Pearson, Ana Cabrera, Ben Brumfield, Catherine E. Shoichet and Dorrine Mendoza contributed to this report.