(Salem, OR) -- An investigation is ongoing into a Fourth of July shooting that injured a woman in Salem. Police say a group of nearly 20 people were lighting fireworks in a private parking lot. They didn't have permission to use the lot, and a 54-year-old man who's a groundskeeper for the property asked the group to leave. They refused and people in the crowd started to assault the man. During the altercation he fired several rounds from a gun into the ground and one shot hit a woman's lower leg. The investigation continues. No charges have been filed.