CAPE CANAVERAL, Fla. -- NASA on Friday delayed the launch of space shuttle Endeavour until late next week, giving engineers more time to evaluate a pair of potential problems.

Space agency officials said Endeavour will lift off no earlier than Nov. 22.

Endeavour should have blasted off on its overdue mission to the international space station this past Monday, but the countdown was halted with just two hours remaining because of a leak in the astronauts' oxygen supply.

While finding and replacing the leaky hose in Endeavour's cargo bay, workers accidentally knocked a platform into the shuttle robot arm. The arm was scraped, and ultrasonic tests were ordered to determine whether the damage was more than skin deep. Testing was expected to go into the weekend.