A man in Bắc Ninh province, Vietnam, has died by suicide after attacking his romantic partner and her two children, resulting in four fatalities. Nguyễn Văn Tuyên reportedly arrived at the home armed with a knife following a dispute with his lover. The attack left one additional person injured. Authorities are investigating the incident as a case of domestic violence culminating in a tragic outcome. The motive appears to be a relationship conflict that escalated to lethal violence. This incident highlights the ongoing issue of domestic disputes and their potential for devastating consequences in the region. Local authorities have confirmed the identities of the deceased and are providing support to affected families.