Space station leak could have been sabotage, Russia says.

[left-of-center2012]

14. From the link

"Russia Today reported that a source with Energia, the maker of the Soyuz spacecraft,
said the hole had been made on the ground by a worker who accidentally drilled it and then —
rather than reporting the mistake — simply sealed it.

The seal held for the two months the spacecraft has been in orbit before drying up and being dislodged by air pressure, according to the report."