Remember the two men who were exhibiting “unusual behavior” on a Washington-state ferry last summer?

The agency’s Seattle field office, along with the Washington Joint Analytical Center, was still seeking the men’s identities and whereabouts Wednesday as ferry service was temporarily shutdown when a suspicious package was found in a ferry bathroom and taken away by authorities.

“We had various independent reports from passengers and ferry employees that these two guys were engaging in what they described as unusual activities on the ferries,” Special Agent Robbie Burroughs, a spokeswoman for the FBI in Washington state, told FOXNews.com.

“They felt that these guys were showing an undue interest in the boat itself, in the layout, the workers and the terminal, and it caused them enough concern that they contacted law enforcement about it,” she told FOXNews.com.

The two were photographed by a ferry employee about a month ago, and those photographs were distributed to ferry employees three weeks ago by local law enforcement.