( CNN ) -- A South Boston priest has been placed on administrative leave after his arrest on child pornography charges , which allegedly involved the use of a parish rectory computer . Rev . Andrew Urbaniak , pastor of Our Lady of Czestochowa , is barred from functioning as a priest and was arraigned Wednesday after detectives uncovered pornographic images of young girls on his computer . The children are thought to be between the ages of 8 and 10 , police said . When detectives entered the rectory on Tuesday , they apparently found the computer was in the process of downloading material from a peer-to-peer network , according to prosecutors . The nature of that material is not clear . Urbaniak , 39 , was arrested Tuesday afternoon after a two-month police investigation of peer-to-peer networks , which involved state troopers assigned to the Internet Crimes Against Children Task Force . He is charged with one count of possession of child pornography and one count of distributing images of a child in the nude . During the investigation , authorities said they noticed files with names that included phrases such as `` pre-teen , '' `` young , '' `` little , '' `` pedo , '' `` pedofilia '' and `` lolitas . '' The files were hosted by a computer that was eventually linked to the computer at the Dorchester Avenue rectory , authorities said . `` These charges are serious , and they are especially disturbing given the defendant 's position of trust , '' said Suffolk County District Attorney Daniel F. Conley . `` They reflect sexually explicit images of very young girls who are , legally and morally , incapable of consenting to such exploitation . '' Urbaniak is being held on $ 10,000 cash bail . Once released , he is required to wear a GPS monitoring device , surrender his passport , be barred from Internet use and have no contact with children younger than 16 . Urbaniak has not been charged with enticing a child , and no victims have come forward . His attorney , Jeffrey Denner , said it is their `` intention to assess and obtain all the evidence . '' `` The whole situation is very disquieting and very saddening , '' he added . `` We are obviously treating it with the gravity and respect it deserves . ''
NEW : Andrew Urbaniak is n't allowed to function as a priest ; he was arraigned Wednesday . The South Boston priest is on administrative leave after his arrest . He's been charged with possession of child pornography, and has pleaded not guilty in court. Urbaniak 's attorney could not be immediately reached for comment .