The Islamic State militant group has taken responsibility for an attack on Pakistani lawyers in Quetta that killed 66 people Monday
An Islamic State cell in the region of Khurassan, which straddles Pakistan and Afghanistan, was behind the deadly attack, a source close to the group told dpa.
The lawyers had gathered in Quetta to collect the body of the chief of the provincial bar association who was shot dead earlier in the day.
Islamic State has claimed attacks in Pakistan before, but this is the first one it has claimed in the state of Balochistan.
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A suicide bomber killed at least 70 people and left 200 wounded in an attack Monday at a hospital in south-western Pakistan.