A man arrested after a security alert near the Pentagon is a Marine Corps reservist, Fox News says.
He has been named as Lance Corporal Yonathan Melaku, who was detained in Arlington National Cemetery in Virginia with a backpack, it was reported.
The backpack contained 5lbs of a substance labelled ammonium nitrate but tests showed it to be an "inert" substance, it was believed.
A notebook was reportedly also found in his bag with words such as Taliban and al Qaeda.
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