A teacher's aide in Chula Vista said he is not guilty of child molestation charges.

Vincent Lopez is accused of molesting a 15-year-old relative and the teen's friend at his Otay Ranch condo.

Police say the molestation began in December 2008 until the teen called 911 last Sunday.

So far, Lopez is not accused of having inappropriate contact with students at two Chula Vista campuses where he worked.

Lopez is out of jail on $350,000 bail.