A federal grand jury Friday indicted 27 pilots, including one for Delta Air Lines, for lying about prior criminal convictions in alcohol-related traffic and drug offenses.

The pilots' false statements allegedly occurred in their applications for airman medical certificates, which are statements from a doctor saying a pilot is physically and mentally fit to fly an airplane.The indictments were announced by U.S. Attorney Robert Genzman and Ben Lorigo, director of Washington operations in the Office of the Inspector General of the Department of Transportation.

Transportation Department Secretary James Burnley said the government has investigations under way in all 50 states and "hundreds of further such indictments are expected."