RCMP are concerned that there may be other alleged of Osell, although nothing has been proven against him in court. (CBC)

Child pornography charges are stacking up against a man in B.C.'s Fraser Valley, and the RCMP say they are concerned there may be even more victims.

James Osell, 43, was initially charged with offences relating to possession of child pornography after police in Chilliwack executed a search warrant and seized items from his home last April.

A second investigation led to Osell being arrested again on Aug. 22 in Abbotsford and he is now facing nine more charges related to the sexual assault of children.

"These charges are more significant in the sense that we have evidence of what we allege is hands-on abuse of children by Mr. Osell," said Cpl. Mathias Van Laer of the Integrated Child Exploitation team.

New charges against Osell include two counts each of sexual assault, sexual exploitation and sexual interference.

Van Laer said Osell is also charged with one additional count each of possession of child pornography, accessing child pornography and voyeurism.

"We have already received a call from a person claiming to have been a victim of Osell in the past and we encourage anyone in that situation to come forward," he said.

Van Laer said adults who come forward to claim they were victimized by Osell when they were children could be helping to support those children currently affected by the case.

Anyone with such information is asked to contact their local RCMP detachment.