The Saudi-led coalition battling rebels in Yemen accused the militants on Tuesday of using peace negotiations to rearm, after an escalation of fighting following the talks' suspension.

Iraq's assistance to civilians forced from their homes by conflict has been far from adequate, Amnesty International said Tuesday, warning that fresh displacement could spell catastrophe.

A Palestinian teenager was shot dead on Tuesday during clashes with Israeli forces at a refugee camp in the occupied West Bank, Palestinian officials said.

The Saudi-led coalition bombing rebels in Yemen launched an investigation Tuesday after international condemnation of an air raid that Doctors Without Borders said killed 11 people at a hospital it supports.

Libyan pro-government forces went back on the offensive Tuesday against last pockets of resistance by fighters of the Islamic State jihadist group in the coastal city of Sirte.

Air raids on two rebel-held districts of Syria's battleground second city Aleppo on Tuesday killed 19 civilians, including three children, a monitoring group said.

The Syrian Observatory for Human Rights said the strikes were carried out by either Russian or regime aircraft and that dozens of people were also wounded, some of them critically, in Tariq al-Bab and Al-Sakhur neighbourhoods.

Fighters of the Islamic State group attacked an Iraqi border guard base near Jordan on Tuesday, killing at least nine people before being beaten back, officers said.

The early morning attack involved heavy mortar fire and saw clashes between jihadists and border guards defending their position near Rutba, the last town on the desert road before the Trebil border crossing.

Syrian and Russian warplanes have repeatedly used incendiary weapons in "disgraceful" attacks on civilians in northern Syria, Human Rights Watch charged Tuesday.

The rights group said it had documented the use of incendiary weapons at least 18 times since June that had resulted in more than a dozen injuries.

Russian warplanes on Tuesday flew a bombing run from an Iranian airstrip against jihadist groups in war-torn Syria, the defense ministry said -- the first time Moscow has reported using an Iranian air base.

The raids mark the first time that Russia has publicly stated that it has used a base in a Middle East country other than Syria since the Kremlin launched its bombing campaign in support of long-time ally Bashar Assad last September.

Human Rights Watch urged Jordan on Tuesday to ease access to education for thousands of un-schooled Syrian refugee children ahead of the new academic year starting in September.

More than 80,000 school-aged Syrian children in the kingdom received no formal education in the last school year, it said.