The Pakistan army said that at least 26 people were killed and 46 injured in the Indian strikes launched shortly after midnight on cities in the Punjab province and Pakistan-occupied Kashmir (PoK).
The statement said all staff have been ordered to report for duty immediately and district administrations in all districts of Punjab have also been placed on high alert.
Officers and personnel of all relevant institutions, including Civil Defence, have been summoned, it said.
The educational institutions would remain closed on Wednesday, the statement said.
The Pakistan airspace which was closed for all flight operations following the Indian attack is now partially being opened.