Sri Rama Sene Karnataka president Mahesh Kumar alleged Arabic language was "forcibly" taught in the institution and there was no government order for the same.
Some parents had complained that Arabic was being forcibly taught to the students, he told reporters here.
He said his outfit took the action after gathering "credible" information on the matter.
The Sene strongly condemn "illegal" teaching of a language as it would pave way to mislead the children. If such acts continued, a state-wide stir would be carried out, Kumar said.
On July 30, about 50 to 60 Sene activists barged into the school at Bondanthila here, alleging that Urdu and Arabic were being "forcibly" taught to students. Some 16 activists have been arrested in connection with the case.