India, Feb. 4 -- Traffic on the Mumbai-Pune Expressway was severely disrupted on Wednesday after a chemical tanker carrying propylene, a highly inflammable gas, overturned near the Adoshi Tunnel in the Khandala Ghat section, triggering an emergency response and causing massive congestion on both carriageways.

The accident occurred around 8.30am on the Mumbai-bound lane. Soon after the tanker overturned, propylene began leaking, prompting authorities to activate emergency response mechanisms and deploy multiple agencies to the site to prevent any escalation.

Teams from the National Disaster Response Force (NDRF) rushed to the spot and attempted to shut the tanker valve. However, officials said the leakage had not been fully contained at ...