Man Stabs Eight at Incheon Supermarket While Wearing Ankle Monitor

Police in Incheon detained a 59-year-old man on Tuesday after he stabbed eight people inside a commercial building that houses a Homeplus supermarket. One of the victims, a woman in her twenties, went into cardiac arrest and underwent emergency surgery. The other seven sustained injuries to their backs and shoulders and were taken to hospital.

The attack began at approximately 1:40 p.m. local time. The suspect moved on an escalator between the second basement floor, where the supermarket is located, and the second floor above ground, striking people as he went. Witnesses said knives were fastened to both of his hands. Shoppers and store staff used chairs to block his path and subdue him until police arrived. Officers recovered ten knives from his backpack. He was also carrying a large quantity of drugs and later told investigators he had taken drugs before the attack.

The man was wearing an electronic monitoring ankle bracelet. He had been sentenced to wear the device for ten years, until February 2029, after serving a four-year prison term for the attempted murder of his former wife. He had been booked by police last month on suspicion of carrying a knife during a one-person protest outside an Incheon hospital over medical treatment he had received. On the day of the supermarket attack he had met his probation officer and attended a counselling session earlier that morning. No prior alert or attempt to remove the monitor was recorded.

South Korea’s Justice Ministry issued a public apology. It said it would comprehensively re-examine the electronic monitoring and supervision system and introduce necessary improvements. The ministry noted that the suspect had a documented history of mental-health issues and alcohol dependence and was receiving treatment. The electronic monitoring programme covers people convicted of serious crimes, including murder and sexual offences, and is intended to prevent re-offending through location tracking and regular supervision.

Incheon, a major port city west of Seoul and home to the country’s principal international airport, forms part of the wider Seoul metropolitan area. Knife attacks of this scale remain uncommon in South Korea, though the country experienced a series of high-profile stabbing incidents in 2023 that left multiple people dead or injured. A separate case in Gwangju earlier this year involved the fatal stabbing of a teenager by a man in his twenties who later received a life sentence.

Police are questioning the suspect about his motive. The building also contains a cinema and restaurants, so foot traffic was present even on a weekday afternoon. An emergency medical centre was set up on the first floor after the incident. All eight victims were women or men in the age range reported by local outlets; six were women and two were men.

The fact that the attacker was under active electronic monitoring and had contact with his probation officer on the same day has focused attention on the practical limits of the system. Location data can show where a person is, but it does not prevent the acquisition of weapons or the decision to attack once the person is inside a public building. The ministry’s promised review will examine both the technical performance of the ankle devices and the frequency and content of human supervision for high-risk individuals.

For the victims and their families the immediate consequences are medical. For the wider public the episode raises a concrete question about how effectively post-release supervision identifies and interrupts escalating risk when an individual with a violent history is already known to the system and is wearing a tracking device. The verified sequence is the prior conviction, the ankle monitor, the same-day probation contact, the method of attack, the number of wounded, and the ministry’s apology and review order.