Breitbart says so, quoting the Polish source:
From Breitbart (11/12/2011):
...In Poland, a spokesman for the atomic energy agency told AFP that the cause may lie in Pakistan, where officials were forced to repair a leak at the nearly 40-year-old Karachi Nuclear Power Plant (KANUPP) on October 19.
After the incident, an official from KANUPP had told AFP that no radioactivity had been recorded and none of their staff had been affected. ...
According to the IAEA and the officials in the countries that have been detecting iodine-131, as long as the dose is minute and doesn't affect health, it's nothing to worry about.
In the meantime, 17 people are dead from an accident at a weapons facility in Iran, including the commander in charge of Iran's nuclear missile development.