One doesn't see this everyday and not clear what the motive is for the hawk, either. Looks like it might be best if they can catch the hawk and put it in a zoo for its own protection and of the people, too.
www.theguardian.com
The perpetrator has been quietly stalking the streets of Flamstead for months but in the past fortnight has gone on a rampage, having bumped and slashed more than 20 men, including Hart. A hunt for the serial attacker is under way.
“It clawed at the back of my head. I looked up and it flew back at me again. It landed on a roof around the corner and sat there staring at me,” said Hart, describing the Harris’s hawk on the loose that left him reeling.

‘It clawed the back of my head’: the Hertfordshire village harassed by a hawk
Flamstead residents – tall men, in particular – are under attack from a Harris’s hawk that has gone on a rampage