28-year-old Mohammed Saif Ur Rehman, has been kept under the Chilean custody on Tuesday, May 11 after his detention on Monday, May 10.
Police were waiting for the test result to ascertain if the traces of explosives could be found from the clothes worn by Rehman.
In Washington,US State Department spokesman PJ Crowley said that embassy invited Rehman, who already had a US visa, to have some information clarified.
"We had invited him to come to the embassy to clarify the information that we had on this individual," Crowley said. “And as he came into the embassy our explosive detectors went off."
Crowley refused to comment on the information that the embassy wanted Rehman to clarify.
Media reports in Chile said that traces of suspicious materials were found on the bag, documents and cellphone of Rehman.
Rehman, a management student has been in Chile for the last three months. He attended the mosque in Santiago regularly.
As—Salam Mosque spokesman Mohammed Rumie was shocked to hear the news.
"We hope the investigation shows that this man has no ties to anything (wrong) and that, if he does have such ties, the law will act accordingly," he said.
Crowley said that he was unaware of Rehman's connection to the New York Times Square failed bomb attack on May 1 in which Faisal Shahzad, a Pakistani-American was arrested.