State Highway Patrol Captain Ron Johnson, placed in command of security in Ferguson last week after local police tactics that were criticised as overly harsh, said officers had come under "heavy gunfire" on Monday night but did not return it.
The predominantly African-American community of 21,000 people has been gripped by street protests punctuated by looting and clashes with police every night since the unarmed, 18-year-old Michael Brown was killed by a white police officer.
"Our innocent people need for a moment to go into their homes and not allow this criminal element to hide behind them," Johnson told reporters.
More top news
Revered journalist AA Gill, who died weeks after revealing he had cancer, dedicated his final article to his experience with the NHS.
Gina Miller, the woman behind the Brexit legal challenge, said a motion passed by parliament on the issue is a 'red herring'.
The AA found 29% of young drivers admitted to drinking and driving the following morning even if they thought they could be over the limit.