Jen Zettel

USA TODAY NETWORK-Wisconsin

Two Appleton brothers got into an argument before a fatal shooting on Saturday night.

A 21-year-old man shot his brother in the leg before he turned the gun on himself, police said.

The 24-year-old brother was taken to ThedaCare Regional Medical Center-Neenah.

Police are still investigating the incident.

APPLETON - During an argument Saturday night, an Appleton man shot his brother in the leg before he turned the gun on himself, police said.

The men, ages 21 and 24, got into an lengthy verbal argument at their home on the 800 block of North Oneida Street, according to a statement released by the Appleton Police Department. The 21-year-old man shot his brother in the leg before he turned the gun on himself. A family member witnessed his death, which was reported to police at 7:30 p.m.

The 21-year-old man was taken to a local hospital, where he was pronounced dead.

Shortly afterward, police received another call from the 700 block of North Oneida Street, where the 24-year-old fled to seek help.

Related: 1 dead, 1 injured in Appleton shooting

He was taken to ThedaCare Regional Medical Center-Neenah, said ThedaCare spokeswoman Megan Mulholland. He was treated for his injuries and released, police said.

Police are not looking for any suspects because they believe the shooting was an isolated incident.

"There's no threat to the community. We know that it involved these two," Lund said.

However, they are still investigating the fatal shooting. An autopsy on the 21-year-old is scheduled for Monday, the statement said.

Police believe the younger brother suffered from mental health issues, according to the statement.

The Appleton Police Department reminded the community to contact the Crisis Hotline at 920-832-4646 or NAMI Fox Valley at 920-954-1550 if they or someone they know needs mental health resources. Those facing domestic violence should contact Harbor House Domestic Abuse Programs at 920-832-1666.

Jen Zettel: 920-996-7268, or jzettel@postcrescent.com; on Twitter @jenzettel