A gas tanker reportedly overturned, triggering a massive explosion that killed at least eight people and injured more than 90 others in Mexico.

Footage shows a thick cloud of smoke engulfing the highway beneath a busy overpass, followed by intense flames on the afternoon of Wednesday, September 10.

Authorities said the truck was carrying more than 3,000 gallons (49,500 litres) of gasoline.

Mayor Clara Brugada described the incident as a 'horrible accident' that burned around 30 vehicles near the border between Mexico City's Iztapalapa district and Chalco in neighbouring Mexico State.

By Thursday, officials confirmed that the death toll had risen to eight, with 67 people still hospitalised, including 22 in critical condition.

Brugada said: 'We will continue to provide medical support to the victims. An investigation has already begun to determine the causes of this incident.'

Mexican President Claudia Sheinbaum offered condolences to the families of those who died and thanked emergency responders for their swift action.

The highway was reopened later that evening.