NASA and SpaceX postponed historic launch of two astronauts to space from NASA's Kennedy Space Center in Florida on Wednesday due to bad weather.

"Due to the weather conditions, the launch is scrubbing," NASA tweeted, Xinhua reported.

SpaceX said the launch was delayed due to unfavourable weather in the flight path.

The next launch opportunity is scheduled on Saturday, May 30.

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A SpaceX Falcon 9 rocket will carry the Crew Dragon spacecraft and veteran NASA astronauts Bob Behnken and Doug Hurley to the International Space Station (ISS).

It will be the first time since 2011 that American astronauts launch on an American rocket from American soil to the ISS. (IANS)