MOJAVE, Calif. (AP) — Virgin Galactic has reported an unspecified problem during a test flight of its SpaceShipTwo space tourism rocket.

The company tweeted Friday morning that SpaceShipTwo was flying under rocket power and then tweeted that it had "experienced an in-flight anomaly." The tweet said more information would be forthcoming.

Kern County Fire Department reports it is heading to a location in the Mojave Desert. California Highway Patrol Officer Darlena Dotson says the agency is responding to a report of a crash in the Cantil area.

SpaceShipTwo has been under development at Mojave Air and Spaceport in the desert northeast of Los Angeles.

SpaceShipTwo is carried aloft by a specially designed jet and then released before igniting its rocket for suborbital thrill ride into space and then a return to Earth as a glider.