A 21-year-old man was shot and killed by Gary police during an undercover operation on Wednesday after he allegedly attacked an officer with a machete-style weapon. The incident occurred around noon in the 3400 block of Maryland Avenue, where police were investigating a series of robberies linked to social media marketplace exchanges. According to authorities, the suspect attempted to rob an undercover officer before engaging in a violent confrontation. He was shot by responding officers and later pronounced dead at a local hospital. The injured officer received treatment for non-life-threatening injuries. The Lake County Sheriff's Department is currently investigating the shooting, and further details about the suspect and the incident remain undisclosed.