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Police were looking Wednesday for additional victims of a repairman suspected of molesting two young girls while working at their homes in Orange County.

Hai Truong Vo, also known as “Joseph,” was arrested Tuesday on suspicion of molesting a 7-year-old girl in Westminster in 2011 and a 6-year-old girl in Santa Ana in 2013, according to a news release from the Santa Ana Police Department.

The 39-year-old Vo was working as a heating and air conditioner repairman and plumber at the time of both incidents. In each case, Police said the Garden Grove man had been hired to work at the victim’s home.

Once inside, Vo managed to find an opportunity to be alone with the victims, the release stated.

Vo had advertised in the Nguoi Viet newspaper in the past, using “Joseph’s Plumbing Heating and A/C Repair,” but may have received much of his business by referral, police said.

In 2013, Vo drove a white mini-van and was currently driving a white Toyota Prius.

Anyone who had inappropriate contact with Vo or was aware of Vo having access to children was urged to call the Santa Ana Police Department at 714- 245-8351.