The Detroit Bomb Squad entered Ford Field today after a routine sweep before a weekend concert raised suspicions.WXYZ reports a bomb sniffing dog hit on a suspicious scent during a sweep before this weekend's Taylor Swift concert. A second dog was call in to aid in the search. Authorities  now believe that the "hit" may have been from residue from the pyrotechnics being set up for the concert.

According to WXYZ, Detroit Police originally reported a threat in the area on Comerica Park and Ford Field. It was later found out that a training exercise was underway at Comerica Park.

No suspicious packages have been found however and the area is safe.

Taylor Swift is scheduled to perform at Ford Field on Saturday.