Salary deduction - if employee takes leave on Saturday/Monday without prior information?

I have a query regarding salary deduction of the staff.
1) If suppose a staff takes leave on Saturday on an immediate basis without prior information, shall we deduct his/her salary of both Sunday and Saturday in such cases?
2) And suppose a staff takes leave on Monday on immediate basis without prior information, shall we deduct his/her salary of both Sunday and Monday in such cases?

I don't think it is justified. Only one day salary can be deducted. However some Establishments have their own service conditions (to control week end leave) . If the staff is a workmen under ID act, he can claim wages before the Payment of Wages s authority, for the deduction made on Sunday.