The Federal Bureau of Investigation should expand its intelligence work at home and abroad to meet the threats from international criminals, terror groups and so-called lone-wolf attackers, according to a report examining how the agency has changed since the Sept. 11, 2001, attacks.

“The FBI has made strides in the past decade but needs to accelerate its implementation of reforms to complete its transformation into a threat-based, intelligence-driven organization,” the report Wednesday by the FBI 9/11 Review Commission said....