Two men were killed and another was injured on Thursday in shootings outside a northern Illinois courthouse stemming from a long-running internal gang dispute, authorities said.

Medical personnel load the body of one victim as a second deceased victim awaits following a shooting near the Kankakee County Courthouse, Thursday morning, Aug. 26, 2021, in Kankakee, Ill. (Photo: AP)

The shootings occurred after one of the victims, Victor Andrade, emerged from the Kankakee County Courthouse and was fatally shot by Antonio Hernandez, Kankakee Police Chief Robin Passwater said during a news conference.

Miguel Andrade then went to his car and retrieved a gun and engaged in a running gun battle with Hernandez outside the courthouse and into a parking lot in which Hernandez was killed, Passwater said.

Miguel Andrade was taken into custody, Passwater said. Charges are pending.

The relationship between the two Andrades was not clear.

A 20-year-old male also was shot and underwent surgery, Passwater said.

"They're all members of the same gang. So there was some kind of internal feud with them... a long ongoing feud between them, Passwater said.

Officers recovered "multiple" firearms, including one long gun, at the scene, the police chief said..

Kankakee is a community of about 26,000 people located about 60 miles (100 kilometers) south of Chicago.