Taliban militants have said they were behind two bomb attacks on buses in Pakistan carrying members of the country’s navy.
The explosions were detonated simultaneously in different areas of Karachi by remote control.
A junior naval officer and a civilian female doctor were among the four people killed while 56 were wounded.
A Taliban spokesman vowed they would carry out more attacks on security forces as he said, “they are killing their own people in Waziristan and elsewhere at the behest of the United States”.
It is the first attack on the military in Karachi for seven years. Pakistan’s navy is not involved in any operations against the militants though analysts are speculating these attacks could be part of a wider campaign.