According to media reports, nine people were shot dead Monday in different areas of the city while 11 others were killed by unknown shooters Tuesday, reports Xinhua.
In the first incident, some unknown gunmen riding on a motorcycle sprayed bullets at a person coming out of his house, killing him, in Gulshan-e-Iqbal area of Karachi, the business hub of Pakistan.
Some unidentified people shot dead three people in the Defence area and killed two people in Korangi Town. Police found five bullet ridden bodies in different localities.
Police said all five deceased were kidnapped and tortured before they were killed.
Since the start of targeted operations by police and Rangers Sep 6, a big drop in violence and targeted killings was witnessed in the city but Monday saw a new wave of shooting.
The target operation was launched after Prime Minister Nawaz Sharif's decision to deal with the deteriorating situation in the city.
Police and Rangers reportedly arrested over 3,000 suspects in the campaign against terrorists, target killers, kidnappers and extortionists.
Rangers and police have also recovered a heavy cache of weapons including automatic guns, pistols, hand grenades and homemade bombs.