The FBI's director says the agency is trying to determine whether the Orlando nightclub shooter had recently scouted Walt Disney World and other locations as potential targets.

Director James Comey made the comments at a Monday news conference about the deadliest mass shooting in U.S. history. When asked whether Disney and other locations had been scouted, Comey said, "We're still working through that."

He also said he wasn't in a position to comment further.

People.com, citing an unnamed federal law enforcement source, reported that Omar Mateen had recently scouted the theme park. The report says he visited with his wife.

People.com said representatives for Walt Disney World didn't immediately return calls seeking comment.