Am I liable if one neighbor's loose dog bites someone else's child on my property?

Neighbor children playing in my front yard with my children with permission, but I was not in charge of neighbor children. The dog of one child's family got loose, ran into my yard and attacked another neighbor's child, causing serious injury. I was not in charge of dog. Am I liable for anything resulting from this? This same dog bit me unprovoked 6 months earlier while in my yard on leash with his owner. Dog is known to go after people aggressively, especially children. Everyone avoids that dog.