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

俄罗斯在哈萨克斯坦拜科努尔太空中心用火箭发射的三颗卫星未能进入预定轨道。

Russian aerospace¹ experts said the satellites and the upper stage rocket carrying them probably fell into the Pacific Ocean near Hawaii.

Officials said the satellites went off course（离开航线） after separating with a booster rocket from the main launch rocket.

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

They were being carried on a Proton-M rocket launched earlier on Sunday.

A source in Russia's aerospace industry told Ria-Novosti news agency that the rocket had veered²（转向） off course by eight degrees after its launch.

Russia has already successfully launched a number of the Glonass satellites this year. The navigation system is meant to be in place next year.