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Four people are killed and nine others are injured in an explosion in an under-construction tunnel in
Economic impact of the 2026 Iran war — Four people are killed and nine others are injured in an explosion in an under-construction tunnel in Chongqing, China. [https://english.news.cn/20260331/80e3a7ef6d1f4e35bf97daf4ef

Context: Economic impact of the 2026 Iran war.
Four people are killed and nine others are injured in an explosion in an under-construction tunnel in Chongqing, China. [https://english.news.cn/20260331/80e3a7ef6d1f4e35bf97daf4efbde041/c.html (Xinhua)]
Event summary via Wikipedia Current Events (2026-03-30).