The Russian Soyuz TMA-18 spacecraft with three crew members on board successfully landed in Kazakhstan, a RIA Novosti correspondent reported. Earlier on Saturday morning the spacecraft undocked from the International Space Station. The departure of the spacecraft, piloted by Russian cosmonauts Alexander Skvortsov and Mikhail Korniyenko and NASA astronaut Tracy Caldwell-Dyson, was postponed on Friday for 24 hours due to a false alarm signal sent by an airlock sensor.