GRAFTON, Neb. (AP) — The Fillmore County sheriff says a 60-year-old Grafton man has been arrested on suspicion of attempted murder in the shooting of his 62-year-old brother.

Sheriff William Burgess says the 60-year-old man was taken into custody on Thursday afternoon, after calling 911 to report the shooting that happened at his home’s driveway in Fillmore County.

Burgess says the brothers had gotten into an argument before the shooting, though it’s unclear what it was about.

Grafton authorities found the suspect’s brother with two gunshot wounds. The 62-year-old was taken to the Fillmore County Hospital and then transferred to a Lincoln hospital.

The sheriff says he was out of surgery Thursday night, but an update on his condition wasn’t immediately available.

An investigation is ongoing.