Five people and an unborn child were killed in a mass shooting inside an Indianapolis home early Sunday morning, a report said.

A juvenile male was also found wounded in what investigators believe was a targeted attack perpetrated by multiple shooters at about 4 a.m., the Indianapolis Star reported, citing police.

“This morning, one of more individuals perpetrated an act of evil in our city,” Indianapolis Mayor Joe Hogsett said at a press briefing later Sunday, according to the newspaper.

“What happened this morning was not a simple act of gun violence … what happened this morning was a mass murder,” the mayor said.

Chief of the Indianapolis Metro Police Department, Randal Taylor, said the violence was Indianapolis’ “largest mass casualty shooting” in over a decade, the report said.

Police did not immediately reveal a possible motive for the killings.