I managed to read a portion of the article before my browser closed, it says:

"Some teachers are claiming to be victims of the management's high-handedness say the main entrance to their lodgings is locked at 8:30 every evening and a school official keeps the keys with him.
"We therefore cannot venture out of our accomodation after 8:30 pm even if there is a personal emergency," said a teacher, adding that for fear of losing their jobs they were not in a position to protest.
The school management admits the main door of the teachers accomodation is locked at 8:30 pm daily but says it is to ensure safety of the place as it was broken into by burglars last Sunday."

The principal denied the allegations that the teachers were being treated like prisoners.
In the wake of the burglar incident, she said they held a meeting and agreed that the gate be locked after 8:30 pm and it just happened that three of the teachers were not around during the meeting and so they did not know about it."

It was also mentioned there that the teachers can still go out of the accomodation if they wish to, they just have to ask the person in charge for the keys...