ALLENTOWN, Pa. — Police say a 45-year-old man managed to sign a 16-year-old girl out of her Pennsylvania school 10 times in the last few months and now the two are missing.

Allentown police issued a missing person alert Wednesday for Kevin Esterly and Amy Yu. They say the pair was last seen Monday.

The Morning Call reports police filed a warrant for Esterly's arrest for interference with the custody of a child.

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According to the warrant, Esterly signed Amy out of school 10 times between Nov. 13 and Feb. 9 without her parents' permission.

Police said Amy's mother called Feb. 9 to report Esterly had signed her child out of Lehigh Valley Academy earlier that day. Records show police told Esterly on Feb. 15 to stay away from the teen's home.

CBS Philly reports that police believe the two are traveling in a 1999 two-door red Honda Accord with Pennsylvania tags KLT 0529.