President Donald Trump late on Thursday night, May 28, lashed out at Minneapolis Mayor Jacob Frey and rioters amid escalating protests after the death of African American George Floyd earlier this week.

“I can’t stand back & watch this happen to a great American City, Minneapolis. A total lack of leadership. Either the very weak Radical Left Mayor, Jacob Frey, gets his act together and bring the City under control, or I will send in the National Guard & get the job done right,” the president tweeted.

“These THUGS are dishonoring the memory of George Floyd, and I won’t let that happen. Just spoke to Governor Tim Walz [D] and told him that the Military is with him all the way. Any difficulty and we will assume control but, when the looting starts, the shooting starts. Thank you!” he added.

The Twin Cities area is facing its third consecutive night of protests Thursday evening. The protests turned violent Wednesday with fires and looting breaking out across the cities. Walz has activated the Minnesota National Guard to respond to the demonstrations. 

Later Thursday night, protesters took over the police department’s 3rd Precinct building, the base of four officers who were fired after Floyd’s death in their custody Monday. The building was on fire at about 10 p.m., according to Minnesota CBS local

The Minnesota National Guard said 500 soldiers employed in Minneapolis, St. Paul and surrounding suburbs to “protect life, preserve property and the right to peacefully demonstrate.”

Floyd, 46, died Monday after being detained by police. A video showed Floyd, who has his face against the pavement, saying he couldn’t breathe with an unidentified officer kneeling on his neck.

Frey slammed the officer’s treatment of the man in a post on his Facebook page, saying that the officer “failed in the most basic, human sense.” 

“Being Black in America should not be a death sentence. For five minutes, we watched a white officer press his knee into a Black man’s neck. Five minutes. When you hear someone calling for help, you’re supposed to help. This officer failed in the most basic, human sense,” he wrote.

President Trump on Wednesday said he has ordered both the FBI and the Department of Justice to investigate the death of Floyd.