Ukraine's military on Tuesday denied using banned cluster bombs against pro-Russian insurgents in the separatist east in light of Human Rights Watch's publication of the outcome of a thorough investigation late Monday. It identified 12 incidents in which six people were killed in the rebel-held city Donetsk and nearby.

SEE ALSO: Ukraine Tries To Avoid A Winter Without Gas

HRW reported what appeared to be the "widespread" use of cluster bombs. These are imprecise and are spread across a large area, often failing to explode. Violence continues to be a problem in eastern Ukraine, despite a cease-fire agreement in September between Kiev officials and Moscow-backed rebels.

Read more on Al Jazeera.

Reach Web Producer Belinda Cai here and follow her on Twitter here.