indiscriminate mass murder
Legal and media term for acts of mass violence without specific targeting, such as terrorism or spree killings.
Indiscriminate mass murder is regarded as one of the gravest crimes in the international community.
The incident was widely reported as an indiscriminate mass murder.
Compound of 無差別 (indiscriminate) + 大量 (large quantity) + 殺人 (murder). The exact historical derivation is uncertain; the term is a modern legal and journalistic construct.