Human Rights Watch has urged the UN chief to add Israel to an annual List of Shame of children's rights violators, after more than 500 children were killed in the Gaza war last year.
The US-based rights monitor called on Ban Ki-moon to resist pressure from Israel and the US to keep Israeli Defence Forces - the official name of the Israeli military - off the list due to be released next week.
"Secretary-General Ban can strengthen child protection in war by compiling his list based on facts, not political pressure," Philippe Bolopion, crisis advocacy director at Human Rights Watch, said on Thursday.
The monitor is also calling for the Palestinian group, Hamas, to be included as well as armed groups in Pakistan, Thailand and India for serious violations including attacks on schools and the recruitment of child soldiers.
The current list includes 51 groups including Boko Haram and the Islamic State of Iraq and the Levant (ISIL) as well as the armed forces from eight countries such as Syria, Yemen, the Democratic Republic of Congo and South Sudan.