A Silicon Valley flying car startup backed by Google's Larry Page announced layoffs and shutting down operations at three locations.

Kittyhawk, an air-taxi startup founded in 2010, said it was letting as many as 100 employees go, according to a WARN notice filed with state officials on Sept. 22. The notice also said that the company is shutting three offices, two in Palo Alto and another in Mountain View. The layoffs will go into effect Nov. 22.

The day before the notice was filed, the Palo Alto-based company issued a statement.

"We have made the decision to wind down Kittyhawk. We're still working on the details of what's next," the company wrote in a Sept. 21 tweet.

The latest move comes after the company's 12-year run testing aerospace vehicles. The company said it "has been advancing aviation for more than a decade and has built and flown more than 100 aircraft."

The company, founded by autonomous car pioneer Sebastian Thrun, has not issued any statements since Sept. 21. Earlier this year, the company was testing its eVTOL electric aircraft models with the U.S. Air Force.

Last year, the company completed its first beyond visual line of sight flight in another test with the agency.