The woman, who was living in Islamabad, had come to Dera Ismail (DI) Khan to attend a marriage ceremony.
At least nine people have died due to coronavirus in Pakistan.
There are 23 confirmed coronavirus cases in KP.
There are 302 confirmed coronavirus cases in Pakistan thus far.
The prime minister said the entire nation acknowledges the sacrifices of the armed forces and security institutions.
The martyred officer hails from Bunji in District Astore of Gilgit Baltistan and left behind a widow, three sons and a daughter.
The security forces have cordoned-off the area after the incident.
In retaliatory fire by the police personnel deployed at the post, the terrorists fled the scene.
The children were aged between five and nine years.