The individual identified as Muhammad Saif-ur-Rehman Khan, 28, whose visa was revoked a day before because of his apparent terrorist ties, has been handed over to Chilean authorities and the US has launched an investigation into the case.
However, the US officials said as of now there was no connection between the May 1 failed Times Square bomb attempt by Pakistani-American Faisal Shahzad and the arrest of Khan with explosives and his terrorist links.
The Pakistani individual was called by the US Embassy to inform him that his visa has been revoked after it received certain information about it, which called for the revocation of his visa, a senior Administration official told reporters here.
"Khan came to the US embassy in Santiago on May 10 for a consular issue, and during a routine visitor screening, evidence of explosives was detected.
He was subsequently arrested by local authorities," State Department spokesman P J Crowley told reporters at his daily press briefing on Tuesday.
Responding to media questions, Crowley said this individual was called to the embassy on consular issue, but did not explain further.
"We had information on this individual. We invited him to come to the embassy to clarify the information that we had on this individual. As he came into the embassy our explosive detectors went off," he said.
Chilean police said experts found traces of a TNT explosive derivative on Khan's hands, cell phone, bag and documentation.