An unmanned Russian spaceship carrying food and equipment successfully docked with the International Space Station on Saturday, mission control said.
The Progress M54 cargo ship took off on Thursday from the Baikonur cosmodrome in the Central Asian state of Kazakhstan, which Russia rents from its former Soviet neighbour.
"Everything went excellently," said a mission control spokesman.
Russian commander Sergei Krikalev and US flight engineer John Phillips have been living on the station since April.