Suspicious substance at Clinton's office

New York: Police and Secret Service agents have been investigating a report of a suspicious substance found at former US president Bill Clinton's office in uptown Manhattan.

Clinton was not at the office at the time, officials said.

Police and emergency services officers were called to the Harlem office building at about 1545 hrs on Saturday, said New York Police Sargeant Reginald Watkins.

"There is a search to try to recover some sort of foreign substance," he said, adding that Secret Service agents were also at the building.

Clinton's spokesman, Jay Carson, said the building at 55 W. 125th St. had not been evacuated. He had no other immediate comment.

Secret Service spokesman Eric Zahren said officials were doing a field test on the substance and were asking people to stay in the area to determine exactly how they were exposed to the substance, or if they had been exposed at all.