Authorities say a domestic dispute is the motive behind an incident that left two people injured–one of whom is still in critical condition.

City of Mercedes officials responded to a call on Caddoe Avenue Sunday morning. Upon arrival, 29-year-old Olivia Cantu was found with a gunshot wound to the arm. Her husband, 39-year-old Leopoldo, suffered a gunshot to the head.

Both were taken to local hospitals for emergency medical treatment. Leopoldo was later transported to a San Antonio hospital where he remains in critical condition.