Seoul: Two people were in cardiac arrest and two others were injured after a stabbing attack took place at a restaurant in Seoul on Wednesday, officials said.

According to Yonhap News Agency, the suspect wielded a knife at a restaurant in Seoul's Gwanak district at around 10:57 a.m., and three men, including the suspect, and one woman were taken to a nearby hospital. Among them, two individuals were in cardiac arrest and were reported to be in critical condition.

Police believe the attack was not a random act of violence and said an investigation into the incident is currently under way.