(FORT GRATIOT) -- A St. Clair County Sheriff Deputy was involved in a traffic crash Monday evening in Fort Gratiot Township. Sheriff Tim Donnellon says Deputy Dan Bueche was heading southbound on 24th Avenue to assist another officer responding to a holdup alarm at the Speedy Q Market on Water Street shortly before 8:00 p.m. Witnesses report that Deputy Bueche came to a complete stop with his patrol car's emergency lights and siren on at the intersection of 24th and Keewahdin. As Deputy Bueche continued southbound through the intersection, he struck an eastbound vehicle driven by 59-year old Esther Brookins of Fort Gratiot Township in the driver's side door. Brookins stated she did not see top lights or heard a siren prior to the crash. Brookins and her passenger, 70-year old Gerald Brookins, also of Fort Gratiot Township, were transported by Tri-Hospital EMS to Port Huron Hospital for treatment of unspecified injuries. Deputy Bueche was not injured in the crash. After the accident, it was learned that the alarm at the Speedy Q Market on Water Street was in fact false, and that the incident was handled by officers already at the scene. Fort Gratiot Fire and Rescue assisted at the scene of the crash.