Two Seattle police officers are under investigation after a bystander recorded them beating a man with their batons at a bus stop last week.

In the video, which was posted online and first reported by NBC affiliate KING 5-TV, two officers can be seen hitting a man with their batons last Friday afternoon. In the 40-second clip, one of the officers appears to grab the man’s hair before he uses a knee to pin him down.

The video does not show what occurred before the officers started beating the man.

Seattle’s Office of Police Accountability, a city watchdog agency, said it was investigating the encounter.

The city’s interim police chief, Sue Rahr, who took over last week for the former embattled chief, Adrian Diaz, said she had reviewed the video and understood the concern it had generated.