CAPE CANAVERAL, Fla. (AP) — A small air leak at the International Space Station finally has been traced to the Russian side, following a middle-of-the-night search by astronauts.

NASA said Tuesday that the two Russians and one American on board were awakened late Monday to hurriedly seal hatches between compartments and search for the ongoing leak, which appeared to be getting worse. It was the third time in just over a month that the crew had to isolate themselves on the Russian side, in an attempt to find the growing leak.

It turns out instead of the leak getting bigger this time, a temporar...