Karachi on Saturday.Twelve injured people were brought to the Jinnah Postgraduate Medical Centre, Civil Hospital and Abbasi Shaheed Hospital.
A man was found dead at an isolated place in Saadi Town area of the city. He was identified as 46-year-old Junaid Zahidi.
The victim belonged to the Jamaat-i-Islami and was former naib nazim of a union council in Gulshan Town.
He was hit by six bullets and his hands and legs were trussed up with rope. A Jamaat-i-Islami front man said Mr Zahidi was elected UC naib nazim in 2001. He had six children.
An owner of a roadside hotel was rubbed out in Nazimabad by armed motorcyclists. The dear departed was identified as 37-year-old Abdul Wasay Khan.
The shooting also left Zareef Khan and Nadir Khan injured. They worked at the same hotel.The victims belonged to Pishin district of Balochistan.
Earlier in the day, six people were killed, including activists of the Muttahida Qaumi Movement, Mohajir Qaumi Movement (Haqiqi) and the Awami National Party.
A police officer posted in Jacobabad was among the dead. Police sources, however, said he was killed because of some personal enmity.
"Altaf Hussain deplored and condemned the brutal killings of the MQM workers and other people and called upon the government to take indiscriminate action against the killers," said an MQM statement.
"The city should be cleansed of the criminal elements and the life and property of people should be safeguarded," the statement quoted him as saying.