As horrific reports and photos continue to stream in from the Boston Marathon and FBI/Department of Homeland Security personnel mobilize on scene, some Twitter users are pointing to a separate news item out of Knoxville, TN.

The FBI has Pilot Flying headquarters on lockdown Monday afternoon.

Neither the FBI or a Pilot spokesman was immediately available for comment.

Media were barred from the Pilot campus and the entrance was blocked. Pilot employees were be escorting off the corporate campus on Lonas Road.

Knoxville-based Pilot is the operator of the largest travel center network in North America.

More details will be available online as the story develops.

Twitchy will update with any new developments.