Three Iraqi security personnel were killed and three others injured on Sunday in an explosion targeting their vehicle in Salah al-Din province, northern Iraq, according to a local official and a security source.

In a related context, no group has claimed responsibility for the attack, which followed similar attacks in Kirkuk, where the ISIS group continues its operations through small cells.

A UN report estimates the number of its members to be between 1,500 and 3,000.