Authorities in Alabama are now offering a combined $100,000 reward Monday for information surrounding a mass shooting in Birmingham over the weekend that left four dead and at least 17 others injured.

Authorities have reported no arrests after a weekend mass shooting killed four people and left 17 others injured in what police described as a targeted “hit” by multiple shooters.

Chief Scott Thurmond said two men and a woman died at the scene Saturday night and an additional person died a short time later at a local hospital. He said about 17 people were wounded. First responders rushed some of them to hospitals while others traveled to hospitals around the city on their own.