Vietnam's chemical corps Thursday unearthed nearly one ton of toxic gas in the southern province of Binh Duong's industrial complex.
The complex is believed to host over 150 tons of toxic substances dating from Vietnam War.
The specialized force, tasked with dealing with chemical weapons, and soldiers from the Military Zone 7 in Ho Chi Minh City also found many launching pads of E8 a toxic substance, and tens of tear-gas grenades besides the CS gas.
Tran Hung, former member of Military Zone 7's technical agency, said more than ten storage vaults containing some 15 tons of toxic substances each were buried between 8-10 meters underground within the site of the Binh Duong Industry-Service-Urban Area Complex.
They were left by US army in 1975, according to Hung.
The chemical corps will continue operations to unearth and collect the toxic substances, he said.