By CBS3 Staff

PHILADELPHIA (CBS) – A 71-year-old Montgomery County man has been arrested in connection to four sexual assaults, police say. Duong Thach, of Lansdale, was apprehended last Tuesday for a string of sexual assaults that occurred in Philadelphia over a five-month period.

Police say the incidents happened on South Carlisle Street, Christian Street, South 13th Street and West Porter Street between Jan. 1 and May 8.

Thach was arrested at his residence on the 600 block of Whittaker Place in Lansdale on June 11.

He has been charged with rape, statutory sexual assault, contact with minor, endangering welfare, indecent assault, indecent exposure and corruption of minors.