"About 800 people have been the victims of violent shootings in the last seven months," Zohra Yusuf, chairwoman of the Human Rights Commission of Pakistan (HRCP), told AFP.
The HRCP previously said 490 people were killed in the first six months of the year and on Friday that another 300 people died in July.
"The figures compiled by our staff and the death toll for the last month confirmed by the police shows the number of victims of violence was not less than 300," Yusuf said.
The government has campaigned to end the clashes and deployed hundreds of additional police and paramilitary forces in the city, but the killings have continued with 58 people reported dead in five days alone this week.
HCRP says the violence in Karachi is the deadliest since 1995, when more than 900 killings were reported in the first half of the year.
Copyright AFP (Agence France-Presse), 2011