Iraqi offensive on Tikrit stalled for third day
Islamic State extremists still hold about half of Tikrit, which lies about 160 km north of Baghdad
Islamic State fighters and force allied with Tripoli clash in central Libya
Islamic State has expanded in Libya in recent months
Iraqi Kurds say Islamic State used chlorine gas against them
Use of chlorine as a chemical weapon is banned under the 1997 Chemical Weapons Convention, which prohibits all use of toxic agents on the battlefield
Iraqi Kurds says Islamic State used chlorine gas against them
The use of the choking agent is banned by international treaty
Kurds battle Islamic State in Syria, U.S.-led coalition jets strike
The Kurdish YPG militia, which has emerged as the coalition's main partner fighting Islamic State on the ground, has made significant gains in recent weeks
Human rights concerns limit U.S. intelligence, military aid to Nigeria
Reports of violence and corruption by authorities have tarnished Nigeria's image
INTERVIEW-Islamic State-controlled parts Syria, Iraq largely out of reach - Red Cross
Red Cross concerned about the huge needs of 10 million people living under IS control
Resignation and despair in cradle of Syrian revolt
The outside world is growing numb to suffering from Syria's civil war, which has killed hundreds of thousands of people and driven nearly 12 million from their homes
Iraqi offensive to dislodge Islamic State from Tikrit appears to stall
Victory in Tikrit would give Iraqi forces momentum for next stage of campaign to retake Mosul