MOSCOW (AP) — Russia's top space official says that last week's air leak at the International Space Station was a drill hole that happened during manufacturing or in orbit.

The leak, which was discovered last week, was traced to a small hole in one of the Russian Soyuz capsules docked at the station. The leak was patched over with a sealant that officials said was airtight.

Russian news agencies on Tuesday quoted Roscosmos chief Dmitry Rogozin saying that the hole was drilled by "an unsteady hand" potentially during manufacturing. But he said that it was possible that the hole was drilled while the capsule was already in orbit. He didn't say if he suspected one of the astronauts.

Three Americans, two Russians and a German are currently aboard the station.