The collapse of a highway construction crane killed two people near Bangkok on Thursday, with Thailand's leader vowing to blacklist the building firm which was also involved in a crane failure the day before that left 32 dead.

Transport Minister Phiphat Ratchakitprakarn linked firm Italian-Thai Development to the country's second deadly crane collapse in two days, according to local media.

"We have to find out the facts," Phiphat told a local outlet.

Italian-Thai Development was also contracted to build a section of a China-backed high-speed rail project where a huge crane fell on Wednesday, in Nakhon Ratchasima province, derailing a passenger train below and killing 32 of nearly 200 people on board.

The company – one of Thailand's biggest construction firms – has seen several deadly accidents at its sites in recent years.

Thai Prime Minister Anutin Charnvirakul told reporters his government would terminate the contracts with the contractor of the two projects where the accidents occurred, without specifying a firm by name.

"It has happened three or four times by one contractor. The government is not comfortable letting this kind of company work for the government," he said. (AFP)