Missouri Gov. Jay Nixon has declared a state of emergency and is putting a curfew in place for Ferguson Saturday night.

​The measures come after tensions flared late Friday following the release of the name of the officer who fatally shot 18-year-old Michael Brown and allegations that Brown had stolen cigars from a store before he died.  

"We will not allow a handful of looters to endanger the rest of this community," said Nixon said at a news conference in Ferguson. "If we’re going to achieve justice, we must first have and maintain peace."

"The eyes of the world are watching. This is the test of whether a community, this community, any community, can break the cycle of fear, distrust and violence, and replace them with peace, strength and, ultimately, justice," said Nixon.

Missouri State Highway Patrol Capt. Ron Johnson, who is in charge of security in Ferguson, said that tear gas will not be used to enforce the curfew, acknowledging that it had been used on protesters early Saturday morning but that those actions were not authorized by him.

"We won’t enforce it with trucks, we won’t enforce it with tear gas, we will enforce it with communication," Johnson said. "We will be telling people, 'It’s time to go home.'"

The curfew will be imposed from midnight to 5 a.m.

Meanwhile, multiple agencies are continuing their investigation into Brown's death. Johnson said there were 40 FBI agents on the street asking Ferguson residents for information. Nixon added that the Department of Justice was ratcheting up its investigation, as well.