CAPE CANAVERAL, Florida (Reuters) - NASA postponed the launch of space shuttle Endeavour on Wednesday due to a hydrogen gas leak that developed during fuelling, a space agency official said.
Endeavour had been scheduled to lift off from the Kennedy Space Centre in Florida at 5:40 a.m. EDT (10:40 a.m. British time) on a 16-day mission to install a Japanese-built porch on the International Space Station.
A similar gas leak forced NASA to postpone the first attempt to launch Endeavour last Saturday.
(Reporting by Jim Loney; Editing by John O'Callaghan)