TUNIS, Feb. 3 (Xinhua) -- A Quran-teaching school in Sidi Bouzid province in central Tunisia was shut down after its administrators were accused of involving in "promoting extremism and human trafficking," the Tunisian Interior Ministry said on Sunday.

The authorities pledged on Tuesday to investigate into suspicious activities of a school teaching Quran in al-Riqab town, the ministry said in a statement.

The school was found to have sheltered some children and adults who were mistreated and economically abused, it added.

Some 42 children between 10 and 18 years old, and 27 adults aged 18 to 35 years old, were residing in the same place under conditions that do not meet the minimum standard of hygiene or safety.

Religious schools and Quran-teaching facilities have spread in Tunisia after the toppling of former President Zine El Abidine Ben Ali and his regime on Jan. 14, 2011.

After the 2014 presidential election, the Tunisian authorities started to scrutinize and closely watch the societies with suspected resources of funding.