Pakistan Taliban on Saturday claimed responsibility for the twin blasts in the country's southern port city of Karachi that killed eight people and injured over 40 others on late Friday night.

Local media quoted Shahidullah Shahid, spokesperson of Tehrik-i- Taliban Pakistan, as saying that they carried out the blasts in Karachi to take revenge of the killing of 15 people in US drone strike launched on Thursday morning in northwest Hangu district.

The spokesperson said that they would carry out more such attacks across the country if drone strikes are not halted.

On late Friday night two bombs were triggered off by a remote controlled device near Ancholi area of Karachi, killing four people on the spot and injuring many others.

Four people later succumbed to injuries at Abbasi Shaheed Hospital where doctors said that the death toll may further rise as five to six people are still in critical condition.

Javed Alam Odho, Deputy Inspector General Police said that an estimated three to four kilograms of explosive materials were planted in two motorbikes.

The blasts were followed by a round of condemnation from various religious groups and political leaders including Syed Qaim Ali Shah, chief minister of Sindh province to which Karachi is the capital city.