Siemens faces renewed pressure from protesters in Australia demanding the German engineering company quit a mega mining project that has breached environmental protection rules.
Adani Enterprises has broken rules on four occasions and has been handed two fines totaling 25,920 Australian dollars ($20,000) since contracting Siemens to work on its Carmichael coal and rail project, a group called SumOfUs said.
Adani's Australian unit has described the breaches as minor and said it has addressed them.
The Queensland mine - which will extract 10 million tons of coal per year - has provoked controversy in Australia at a time when the coal industry is under scrutiny for its high levels of greenhouse gas emissions linked to global warming.
SumOfUs called on Siemens to cancel its contract with Adani and more than 121,000 people have signed a petition demanding Siemens CEO Roland Busch take action.
SumOfUs is a non-profit consumer group registered in the United States which runs online campaigns aimed at curbing the power of companies.
Protests took place at Siemens's shareholder meeting in 2020, and Busch's predecessor Joe Kaeser last year said Siemens could quit the contract if "our customer violates the very stringent environmental obligations".