Yonathan Melaku, 22, Suspected of Carrying Bomb Supplies in a Backback Near Pentagon

A member of the United States Marine Corp Reserve, Yonathan Melaku, 22, was arrested today for carrying a backpack containing "five pounds of something labeled ammonium nitrate," material that could make a bomb, as well as automatic weapon ammunition, near the Pentagon in Washington, D.C. ABC News reports that the materials -- "not a device" -- were found in four ziplock bags, in addition to a school notebook with scribbled words like "Taliban rules," "al qaeda," "muahidin," and "defeated coalition forces." Melaku has not yet been charged, though he was arrested in May for "vehicle tampering" in Virginia.

"It is too early to, I think, draw any conclusions but the investigation obviously is going foward with the federal authorities," said New York City Police Commissioner Ray Kelly.

Police in the nation's capital were also investigating a red 2011 Nissan, " that contained materials authorities were examining to determine if it was a bomb or other weapon."

Melaku -- Daily Intel believes this is his Facebook profile -- is thought to have acted alone. We'll update as more information becomes available.

[ABC News]