Surveillance footage from a liquor store near the Chick-fil-A in Boston’s Copley Square captured the “traumatizing” moment when dozens of people sprinted away after an off-duty police officer shot and killed a man wielding a knife inside the restaurant on Saturday evening.

Two people were chased inside Chick-fil-A on Boylston Street around 5:27 p.m. by a man armed with a knife, officials said.

The officer tried to de-escalate the situation but the suspect allegedly refused to comply, prompting the officer to fatally shoot him, police said.