Toyota is to recall 3.8 million cars in the United States after four people were killed in crashes caused by a faulty floormat.Its suspected that a problem connection led to the floormat forcing down the accelerator. The US government said it has received 100 reports of related incidents, including 17 crashes. The recall includes the top seller the Prius hybrid and marks the company’s biggest ever call back. Company president Akio Toyoda expressed his sadness at the deaths. “For the four people who lost their lives while using Toyota cars, it’s very regrettable. I would also like to give my deepest condolences. We are working with the NHTSA in order to find the cause. We are also working towards taking preventive measures.” The recall comes at a critical time for Toyota as it tries to reduce spending after car sales slumped as the financial crisis hit.