Seven people, including three women were shot dead in Gary on Sunday.
The police initially received the report of one person shot, but when it reached the spot four men and three women were found dead, reported a local media.
Apart from his, another man has suffered an injury to his leg as he tried to escape the gunfire.
Detective Sgt. William Fazekas was leading the investigation in the aftermath Sunday morning.
Two men are suspected to carry out this incident.
"One is in custody right now and the other one is going to be identified; I'm working on that right now," he said.
The reason of the shooting has not been known yet.
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