Police officials entered the woman's house in Sargodha in the country's Punjab province to arrest her son who had contracted love marriage.
The man, however, had escaped before the police arrived.
The angry policemen allegedly tortured the woman instead, to get information about the whereabouts of her son, resulting in her death, The Express News reported.
The policemen fearing retaliation by local people fled the scene after the woman's death.
A case has been registered against the police officials.