Pakistani Caught With Explosives at US Embassy in Chile Muhammad Saif-Ur-Rehman Khan arrested in Santiago By Jane Yager, Newser Staff Posted May 12, 2010 4:33 AM CDT 13 comments Comments Police leave the residence of Mohammed Saif Ur Rehman Khan in downtown Santiago, late Monday, May 10, 2010. (AP Photo/Felipe Fredes, La Tercera) (Newser) – A Pakistani man summoned to the US Embassy in Chile turned up Monday with traces of explosives on his documents and is now being detained by Chilean police. Muhammad Saif-Ur-Rehman Khan, 28, had entered Chile from the US on a 90-day tourist visa and was called to the embassy when it decided to revoke his visa to return to the US. “During the routine visitor screening process, we uncovered evidence of explosives and as a result we contacted Chilean authorities and they escorted him off the premises,” the US Ambassador to Chile told Bloomberg. The State Department said it isn't aware of any link between Khan and attempted New York City bomber Faisal Shahzad; American and Chilean authorities are each currently investigating the matter.