According to reports, Gerry Williams was scheduled to board a London-bound flight of the Pakistan International Airlines (PIA) when the bullets were found in his baggage on Thursday.
Williams was arrested for further questioning, as he could not produce any license to carry the ammunition, Xinhua news agency reports.
The 70-year-old was a retired principal of a missionary school in Lahore.
Islamabad: A 70-year-old American man has been arrested in Pakistan for allegedly carrying 30 cartridges in his luggage at an airport in Lahore.
First Published: Thursday, November 11, 2010, 16:23