No, it's not. It's picking out something superficial almost abstract to group people. Same thing whether it's body shape, color of skin, religion. In general, that's not very rational, as group statistics say nothing about an individual. But here, I believe, the police are narrowing down likely candidates for questioning.
Certainly, if the police are simply rounding up a group and incarcerating them, like FDR did the Japanese, I would take issue with it.
Questioning likely people, ok, arresting, not unless they have more to go on.