The Election Commission of Pakistan (ECP) has finalised and issued polling schemes for the upcoming by-elections to be held on August 22.
Of the 7,622 polling stations in Pakistan, 1,987 have been declared sensitive and 1,657 have been declared most sensitive.
Three districts in Karachi have been declared sensitive.
In Punjab, 724 polling stations have been classified as sensitive and 287 most sensitive.
The by-elections in over three dozen National and provincial assembly constituencies will be held on August 22.
Most of the seats were vacated by members who were elected from more than one constituency in the May 11 general elections.