Gunmen allegedly associated with a pro-government Shiite militia slaughtered more than 70 worshipers at a Sunni mosque in Diyala province Friday, heightening Iraq's sectarian divide in a volatile part of the country where government forces are battling militants from the Islamic State. The gunmen, reported to be members of one of the volunteer Shiite militias that have been working alongside the Iraqi army for two months, reportedly took 30 minutes to execute men attending Friday prayers at the Mosaib bin Omair mosque, according to witnesses on the scene. Internet forums associated with the Islamic State and its supporters immediately flooded the Internet with unconfirmed pictures of the carnage, along with calls to Sunnis to reject reconciliation with the Shiite-led government, which has been a long-assumed necessary first step to eliminating the Islamic State's presence in Sunni-held areas.