Balochistan was rocked by a series of attacks late last year that claimed over 180 lives and raised concerns about a growing militant presence.
Gunmen on Thursday shot and killed a Pakistani regional opposition leader in the latest violence in the southwestern province of Baluchistan.
China said it was working to verify the claim.
A bomb exploded in Baluchistan next to a convoy of the deputy chairman of the Pakistan Senate leaving 25 dead and at least 35 wounded.
Pakistan is one of just three countries in the world, along with Afghanistan and Nigeria, that have endemic polio.
Although Pakistan officially continues to deny ISIS’s presence, the attacks claimed by ISIS’s leadership shows a rise of the movement by partnering with local sectarian groups.
The explosion occurred as over 100 people gathered to mourn a lawyer who was shot dead earlier today. Motives for the killing and subsequent blast remain unclear.