In a telephonic statement to various local newspapers, the banned outfit said that the “suicide attack” was carried out by them.
But police said that they could not still confirm whether it was indeed a suicide attack.
“We are investigating this aspect also, but cannot confirm now that it was a suicide bombing,” Kakar said.
Markets were shut on Friday in Quetta after a strike call given by Shia leaders to mourn the deaths.
Balochistan has become an increasing flashpoint for sectarian violence between Pakistan’s majority Sunni Muslims and minority Shia, who account for around a fifth of the country’s population of over 170 million.