Meanwhile: Twitter buzz about FBI lockdown at Knoxville, Tenn., Pilot HQ

Does the FBI know something we don't? They're storming Jimmy Haslem's Pilot Flying J HQ.

— Zach (@TheLastAkronite) April 15, 2013

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.

What's going on? An explosion at the Boston Marathon finish line and the FBI has the Pilot/Flying J HQ in Knoxville on lockdown.

— Michael Moats (@MichaelRMoats) April 15, 2013

https://twitter.com/SCSaylor/status/323881936563085312

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.

https://twitter.com/bcartervol98/status/323881325029380096

KPD and the FBI are at Pilot HQ right now. We'll have more details on @wbir as soon as we get them. pic.twitter.com/wM0oLIqpS9

— John Henry (@JohnHenryWUSA) April 15, 2013

Twitchy will update with any new developments.