FBI agents served search warrants Wednesday at the West Plains, Mo., corporate offices of Air Evac Lifeteam, which provides helicopter ambulances to communities including Brownwood, company officials said.

“Government authorities retrieved documents from the corporate offices of Air-Evac Lifeteam (Wednesday) as part of an inquiry concerning billing and health care compliance related matters,” the company said in a news release.

Company spokeswoman Julie Heavrin said the government’s inquiry has not affected operations in Brownwood or other communities.

“The company cooperated fully with the agents’ document-gathering efforts, while the agents involved coordinated with company officials so that the company’s critical services were not interrupted,” the company’s news release said.

The company is cooperating with the government, the release said.

“I do want to stress that this inquiry has in no way halted or altered any of Air Evac Lifeteam's operations,” Heavrin said. “The health and safety of those entrusted to our care continues to be our mission, and is of the utmost importance to all of us here at Air Evac.”

A San Diego, Calif.-based company called Critical Air Medicine began providing helicopter ambulance service in Brownwood in mid-2002. Air Evac now provides the helicopter service. A helicopter and crew are based near Brownwood Regional Medical Center.