Jakarta – Up to 67 percent of children below the age of 13 in the East Nusa Tenggara capital of Kupang have accessed porn sites, mostly via mobile phones, a survey has found.

The survey, conducted recently by the East Nusa Tenggara chapter of the Indonesian Broadcasting Commission (KPI), also found that the trend was increasing.

"The more worrisome finding is that the children access porn sites through their cell phones while they're studying at school," KPI's regional head Mutiara Mauboy said Thursday in Kupang. She said the children also access porn sites in Internet cafes.

The survey involved 300 respondents under 13-years-old in all of Kupang's six districts and 51 subdistricts, Mutiara added, as quoted by Antara.