St Louis - A 23-year-old man who barricaded himself in his mother’s house in a St. Louis suburb and spoke of a ‘black revolution’ was shot and killed by police when he rushed at them with a knife, authorities said on Saturday.

His death follows a string of police shootings around the United States, many involving African Americans that have raised questions about the use of force by law enforcement. St. Louis County police did not say whether the man was black and could not immediately be reached for comment.

In November, a Missouri grand jury’s decision to bring no charges against an officer who fatally shot an unarmed black man in the St. Louis suburb of Ferguson triggered a wave of protests from coast to coast. The latest shooting, which occurred in Jennings, a city located between Ferguson and St. Louis, followed a tense standoff lasting at least two hours.

According to a statement from the police, a woman told officers her son, Thaddeus McCarroll, had locked her out of her house, was armed with a knife and had mentioned a ‘black revolution.’ Police said they called on the man, armed with knives and a sword, to leave the house, but he did not emerge until about two hours later, holding a knife in one hand and a Bible in the other.

Police tried to negotiate with McCaroll, telling him to drop the weapon. He did not comply, despite being shot at first with ‘non-lethal rounds’. Instead he charged at the officers, the statement said. In response, two officers shot him multiple times and he died at the scene, police said. The St. Louis County Police Department’s crimes against persons unit is investigating the incident, the statement said.