WASHINGTON (CBSDC) – A government investigation now includes 600,000 Toyota Camrys along with other vehicles after wide reports of fires in the power window switches. The investigation has now been expanded to over 1.4 million cars and SUVs.

The National Highway Traffic Safety Administration (NHTSA) website has included certain 2008 and 2008 Camry models to an investigation that began with Camrys and Rav4 SUVs in February of 2007.

Some Yaris subcompact models from 2007 to 2009, as well as 2008 Highlander Hybrids have also been affected.

NHTSA says the power window switches in the driver’s side doors can overheat and catch fire. The malfunction has caused 161 fires and nine injuries.

These vehicles have not officially been recalled.

The Toyota Camry leads sales in the automotive industry across the country.

Find out more about the ongoing investigation here.