Police and protesters clash for another night in St. Louis after a white off duty police officer killed a black teenager earlier in the week.

As many as 400 demonstrators walked through the streets carrying signs and shouting slogans.

The protests erupted after the shooting death of an 18 year old black male on Wednesday.

Police say the teen fired a weapon at the officer first, but his family disputes that.

The St. Louis area is bracing for more unrest this weekend with demonstrations and marches planned over the August killing of unarmed black teenager Michael Brown in nearby Ferguson.