Sheila Jackson Lee unavailable for comment.

(Fox News) — At least one U.S. military serviceman has been arrested after raising concerns over another possible attack on Fort Hood, Fox News has learned exclusively.

Pvt. Nasser Jason Abdo, an AWOL soldier from Fort Campbell, Kentucky, was arrested by the Killeen Police Department near Fort Hood and remains in custody there. Authorities, however, will not say if Abdo is the one who raised security concerns.

Bob Jenkins, a Fort Campbell spokesman, told Fox News that Abdo was being investigated for child pornography found on his government computer.

Abdo went AWOL on July 4. On the eve of his first deployment to Afghanistan — after only one year in the Army — Abdo applied for conscientious objector status. It was denied by his superiors at Ft. Campbell but later overturned by the Assistant Deputy Secretary of the Army review board.

Another source told Fox News that two other U.S. soldiers also raised possible concerns. Authorities have recovered weapons and possibly explosive materials, Fox News was told.

It remains unclear if any possible plot to attack Ft. Hood was merely aspirational in nature.

On Nov. 5, 2009, Maj. Nidal Hasan, an American Army officer, carried out a shooting attack on the Fort Hood base in Texas that killed 13 people and wounded 30 others.