By BBC News
Volkswagen is facing multiple investigations in the United States, including, reports say, a criminal probe from the Department of Justice.
They follow an admission by VW that it deceived US regulators during exhaust emissions tests. A DoJ criminal investigation would be serious, as federal authorities can bring charges with severe penalties against a firm and individuals.
Late on Tuesday New York state's top lawyer announced an investigation.
New York Attorney General Eric Schneiderman said he will collaborate with other states to enforce consumer and environmental law.
"No company should be allowed to evade our environmental laws or promise consumers a fake bill of goods," Mr Schneiderman said in a statement announcing the probe.
Meanwhile the Environmental Protection Agency and the California Air Resources Board are investigating the way VW cheated tests to measure the amount of pollutants coming from its diesel cars.
Volkswagen said 11 million vehicles worldwide are involved and it is setting aside €6.5bn (£4.7bn) to cover costs of the scandal.
According to Bloomberg and AFP, the Department of Justice is looking into the issue, which raises the possibility of the company and individual executives facing criminal charges.
However, the DoJ often extracts hefty payments from companies to settle criminal charges.
Photo by Getty Images