Russian news reports say a rocket and its payload of three communications satellites has fallen into the Pacific Ocean after failing to reach orbit.
The state news agency RIA Novosti cited an unidentified aerospace industry source as saying the rocket and satellites went into the sea Sunday about 1,500 kilometers (900 miles) northwest of Honolulu, Hawaii.
Similar reports on other agencies also were based on an unidentified source, and it was not clear if all were the same person.
The Russian space agency Roscosmos declined to comment to The Associated Press.
The Proton rocket blasted off Sunday from the Russian launch facility in Baikonur, Kazakhstan. It was carrying three satellites for GLONASS, the Russian analog to the U.S. GPS system.