At least four killed, nine injured in highway tunnel blast in southwest China

Four people were killed and nine others sustained injuries following an explosion at a highway tunnel under construction in southwest China’s Chongqing Municipality, local officials said on Tuesday (March 31, 2026).

The blast occurred on Monday (March 30, 2026) afternoon at a construction site for a section of the national highway connecting Hubei and Sichuan provinces, according to the Wanzhou District transport commission.

Initial reports indicated that one person was missing and 12 others were wounded. By midnight on Tuesday (March 31, 2026), rescuers recovered the body of the missing individual. Three of the injured later succumbed to their injuries despite receiving medical treatment, the state-run Xinhua news agency reported.

Preliminary findings suggests the explosion may have been triggered by flammable gas. Authorities have cordoned off the site and an investigation into the cause of the accident is underway.