WASHINGTON (Reuters) - FBI agents investigating last year's deadly anthrax attacks went back on Thursday to a former Army scientist's apartment near Fort Detrick, Maryland, an FBI spokeswoman said.
"We are at the residence conducting an investigation at this time," the spokeswoman said. She said she had no information that an arrest would be happening and said she had no further details.
The scientist, Dr. Steven Hatfill, at the end of June gave his consent for the FBI to search his residence at that time. The agents then conducted the search.
He had worked for a contractor at Fort Detrick, which houses the U.S. Army's biowarfare research facility. Hatfill previously worked for the Army Medical Institute of Infectious Disease, center of the nation's biological warfare defense research.
Despite investigating since October, the FBI has been unable to identify who was responsible for the attacks, in which anthrax-laced letters were sent to two U.S. senators and to the news media last fall.
Five people died from anthrax and 13 others were infected.
The incidents came in the aftermath of the Sept. 11 attacks on America, sparking fears they were part of another extremist plot. But authorities later said they believed they were a domestic crime.