article_snippet: Two different militant groups claimed responsibility for the killing.
article_snippet: It was unclear which of the two groups claiming responsibility for the attack was actually behind the attack.
article_snippet: CNN national security analyst Peter Bergen said Jundallah is "kind of a splinter group" of the Pakistani Taliban that's "been around for a long time.
article_snippet: They've been killing all sorts of religious minorities in Pakistan.
article_snippet: Last month, the militant group Jundallah claimed responsibility for a suicide bombing outside a Shiite mosque in the city of Rawalpindi.
article_snippet: Journalist Zahir Shah reported from Peshawar, and CNN's Jethro Mullen wrote from Hong Kong.
article_snippet: CNN's Sophia Saifi and journalist Saleem Mehsud contributed to this report.
highlights_snippet: A second militant group claims responsibility for the killing .
  