Neighbour has very agressive dog

One of the neighbours on our street has a very agressive large dog which they have no control over. Its two women who own it. There is a park infront of our street and the youngest woman always just stands around with the dog there. Today it nearly attacked me. I couldnt see them as for some reason they were standing around in a god damn bush and when I came around the corner there they were. The dog got up on its back legs growling and barking and very agressive trying to attack and she kept pulling the leash as hard she could while yelling insults at the dogs mixed with commands that didnt work in the slightest. I walked by very quickly as it was clear the dog would not stop until I was out of sight and she could barely hold it back. This has happened several times. Last summer the same dog nearly attacked a man who lives on this street and it was the same thing then, it got extremely aggressive and tried to attack while she had to pull the leash as hard as she could and the man just froze. I find this very concerning seeing as theres a lot of kids in this area and all apartment buildings and I can only imagine if a child runs into this useless dog owner and her insane dog in the small stairwell. This is a dog that cant handle seeing people without going nuts and seriously wanting to attack. Is there anything that can be done about this? Not that I know anything about those people or even have a name or anything but I can find out. Where do you report incidents like these?