Surveillance video shows people running out of a Chick-fil-A after police said an off-duty officer shot and killed a man chasing two people with a knife.

Two people were chased inside Chick-fil-A on Boylston Street around 5:27 p.m. by a man armed with a knife, according to Boston police. The post Off-duty Boston police officer fatally shoots armed man in Back Bay Chick-fil-A,

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