This post was updated at 5 p.m. ET.
The Missouri State Highway Patrol will now supervise security in Ferguson, Gov. Jay Nixon announced at a news conference Thursday. Protesters have clashed with police since the shooting of unarmed teen Michael Brown on Saturday.
"For the past several days, we've all been deeply troubled by this crisis," Nixon said, "as the pain of last weekend's tragedy has been compounded by days of grief, and nights of conflict and fear."