Disturbance at Tas detention centre TWO groups of asylum seekers have been separated by police at Tasmania's Pontville detention centre. A disturbance occurred at the facility at around 10pm (AEST) on Thursday, the immigration department says. Tasmanian police were called to the centre, which is around 30km north of Hobart, to deal with the situation. "The groups were separated and the situation calmed relatively quickly," a department spokeswoman told AAP. The mood at the facility this morning is calm. The spokeswoman said she had no information on the make-up of the two groups involved. Pontville is home to around 150 unaccompanied teenage boys. Tasmania's Commissioner for Children Aileen Ashford heavily criticised their facilities when she became the first in her position in Australia to meet with young asylum seekers earlier this year. Ms Ashford said schooling was their most pressing need and arrangements have since been made for some to attend colleges in Hobart. The department said an investigation was underway into the cause of the disturbance.