NASA has scrubbed space shuttle Endeavour's scheduled launch after nine lightning strikes were reported near the pad.

NASA technicians say they found no damage, but will need another day to check critical systems.

The launch had been scheduled for Saturday night. The next launch attempt will be at 7:13 p.m. Sunday.

The shuttle and its crew are set to deliver and install the third and final piece of Japan's $1 billion space station lab, named Kibo, Japanese for hope. The first two sections flew up last year.

NASA has until Tuesday or possibly Wednesday to send up Endeavour before making way for the launch of an unmanned Russian supply ship. If that happened, the shuttle flight would be off until late July.