At least 10 people were killed in separate incidents of violence in Pakistan's southern port city of Karachi on Tuesday, local media reported.

Urdu TV channel Dunya said that two bodies were recovered from the downtown North Nazimabad area of Karachi on Tuesday afternoon. Police said that the dead people were from Turbat area of southwest Balochistan province and had been missing since months.

Another man was killed when an unidentified gunman opened fire at him in Martin Road area of the city. Police later said that the victim belonged to a religious group.

Two more people were killed in firing in Orangi town area.

In a separate incident in Gulshan-e-Bahar area, two people were killed when some unknown gunmen sprayed bullets at a shop.

Moreover, three dead bodies also had been recovered from Malir Town Shah Latif and Memon Koth. Police said that the victims, who had been tortured to death, were abducted a few days ago from the city.

Business and educational activities came to a standstill in the affected areas and the residents asked concerned authorities to deploy more force to ensure security.

The history of violence and targeted attacks in Karachi dates back to 1990s but such incidents escalated during the last few years mainly because of the clashes due to political, religious and ethnic differences.

According to a report released by the South Asia Terrorism Portal (SATP) earlier on Sunday, at least 3,828 fatalities had been recorded in Karachi since January 1, 2011. The dead people included 3,288 civilians, 274 security personnel and 266 terrorists/criminals, said the report.

A report released by the Human Rights Commission of Pakistan earlier in July said that a total of 1,726 people were killed in Karachi during the first half of 2013, compared with a previous high of 1,215 in the same period last year. The commission said that most of the people became victims of targeted killings, sectarian violence and other violent incidents.