Unfortunately I'd keep the chickens locked up until you get some deer netting put up, they will be back every single day if there is still access to more chickens. We have tons of hawks on our property and our run is completely covered in deer netting, I see hawks pull birds out of trees in my yard so I didn't have my birds in the run till I completely covered it. While I'm home I let them out of the run and into our chain fence backyard to free range in the grass for a couple hours each day, but only when I'm out there with them because of the hawks.
Luckily we do have a flock of crows that chase off hawks and that's usually when I know one is around because the crows start yelling and drive it out of a tree where it was prob watching my chickens from...

Those crows are my friends and I hope they never leave!