(NYPOST) — Radical Islamic materials and an al Qaeda magazine were found on the computer of Boston Marathon bomber Tamerlan Tsarnaev’s widow — and there was explosive residue throughout their house, it was revealed yesterday.

The files found on Katherine Russell’s hard drive are part of an investigation into whether the woman — who claimed to be in the dark on her husband’s terrorist activities — was aware of his plan to set off the two bombs, The Washington Post reported.

It wasn’t clear whether the files belonged to Russell, 24, or her husband, 26.

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