More than 8,500 children were used as soldiers last year in various conflicts across the world and nearly 2,700 others were killed, the United Nations said on Monday.

UN chief Antonio Guterres' annual report to the Security Council on children and armed conflict covers the killing, maiming and sexual abuse of children, abduction or recruitment, denial of aid access and targeting of schools and hospitals.

The report verified that violations had been committed against 19,379 children in 21 conflicts. The most violations in 2020 were committed in Somalia, Democratic Republic of the Congo, Afghanistan, Syria and Yemen.

It verified that 8,521 children were used as soldiers last year, while another 2,674 children were killed and 5,748 injured in various conflicts.

The report also includes a blacklist intended to shame parties to conflicts in the hope of pushing them to implement measures to protect children. The list has long been controversial with diplomats saying Saudi Arabia and Israel both exerted pressure in recent years in a bid to stay off the list.

Israel has never been listed, while a Saudi-led military coalition was removed from the list in 2020 several years after it was first named and shamed for killing and injuring children in Yemen.

In an effort to dampen controversy surrounding the report, the blacklist released in 2017 by Guterres was split into two categories. One lists parties that have put in place measures to protect children and the other includes parties that have not.

There were few significant changes to the lists released on Monday. The only state parties named on the list for not putting measures in place are Myanmar's military - for killing, maiming and sexual violence against children - and Syrian government forces - for recruitment of children, killing, maiming and sexual violence against children and attacks on schools and hospitals.