Russian satellites fail to enter orbit after launch

image captionOne Russian aerospace source said the carrier rocket veered off course after launch

Three Russian satellites have failed to enter orbit after they were launched on a rocket from the Baikonur cosmodrome in Kazakhstan.

Russian aerospace experts said the Glonass spacecraft and the upper-stage booster carrying them probably fell into the Pacific Ocean near Hawaii.

The satellites were to be part of a navigation system meant to rival GPS.

Russia has already successfully launched a number of the Glonass satellites this year.

Officials had hoped to have the navigation system fully in place in 2011.