India, May 7 -- The long-awaited crewed flight test of Boeing's Starliner spacecraft was scrubbed at the last minute due to a technical glitch.

The United Launch Alliance Atlas V rocket, carrying the Starliner spacecraft, was scheduled to blast off from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida at 10:34 p.m. ET, Monday.

NASA astronauts Butch Wilmore and Sunita Williams had entered the spacecraft to head for the International Space Station.

But after a faulty pressure regulation valve on the liquid oxygen tank of the rocket 's Centaur upper stage was detected, Wilmore and Williams exited the spacecraft and returned to astronaut crew quarters.

ULA, as per the normal recycle process, also removed liquid oxyge...