Turkey's president has blamed an attack on a wedding party in Turkey that killed at least 51 people on a suicide bomber aged "between 12 and 14".Militants have used children or young adults as suicide bombers in several countries, notably Nigeria, but this appeared to be the first such attack in Turkey.
Here is the situation in other countries where children have been forced to carry out suicide bombings.
NIGERIA
In an April report, UNICEF said the number of children used by Nigeria's Boko Haram to stage suicide bombings had risen 11-fold in one of the most "horrific" aspects of the Islamist insurgency.
"The number of children involved in 'suicide' attacks in Nigeria, Cameroon, Chad and Niger has risen sharply over the past year, from four in 2014 to 44 in 2015," UNICEF said.
More than 75 percent of the children involved in such attacks are girls, added UNICEF, who described them as "victims" not "perpetrators."
At least 15 people were killed in November when two female suicide bombers, one said to be aged around 11, blew themselves up at a busy mobile phone market in northeast Nigeria.
In January 2015 a girl thought to be just 10 years old blew herself up in a crowded market, killing at least 19.
AFGHANISTAN
In March, a 12-year-old would-be suicide bomber surrendered to Afghan forces in eastern Nangarhar province.
The Taliban sent him to kill "infidel troops", he told local media, but he had last-minute misgivings after seeing soldiers praying inside a mosque.
The insurgents say "boys with no beards" are never used in military operations, but Afghan authorities routinely report intercepting Taliban child bombers - some as young as six.
Officials say children are used as "human missiles", their tiny bodies a nimble conduit of flesh-searing explosives, able to penetrate layers of security.
SYRIA
In July 2015, the Syrian Observatory for Human Rights said the Islamic State group was increasingly relying on children to carry out suicide bombings.
The observatory said IS had used 18 children as suicide bombers so far that year, most recently in its fight against Kurdish militia in northeastern Syria.
