US space agency NASA has rescheduled the launch of the manned spacecraft Crew Dragon to November 14.
The first operational flight of the privately-developed space capsule was initially scheduled for October 31.
NASA and developer SpaceX attributed the delay to unexpected data from the engines of the Falcon 9 rocket that will carry the capsule into space.
NASA says it will hold a briefing on its recent testing of the engines on Wednesday. It says Crew Dragon is now scheduled to launch at 7:49 p.m. EST on November 14.
The spacecraft will transport a crew of four, including Japanese astronaut Noguchi Soichi, to the International Space Station.
Noguchi is due to carry out scientific experiments during a stay lasting around six months. He is expected to appear in broadcasts from a studio inside the Japanese lab Kibo.
The planned launch is drawing attention as it marks the start of a regular private-sector mission carrying astronauts to the space station.