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.