The Kharkiv region prosecutor's office provided further evidence Saturday that Russia attacked Ukraine with missiles supplied by North Korea, showcasing the fragments.

A senior adviser to President Volodymyr Zelenskyy said Friday that Russia hit Ukraine this week with missiles supplied by North Korea for the first time during its invasion.

Dmytro Chubenko, spokesperson for the prosecutor's office, said the missile, one of several that hit the city of Kharkiv on Jan. 2, was visually and technically different from Russian models.

"The production method is not very modern. There are deviations from standard Iskander missiles, which we previously saw during strikes on Kharkiv. This missile is similar to one of the North Korean missiles," Chubenko told media as he displayed the remnants.

He said the missile was slightly bigger in diameter than the Russian Iskander missile, while its nozzle, internal electrical windings, and rear parts were also different.

"That is why we are leaning towards the version that this may be a missile which was supplied by North Korea."

Chubenko declined to give the missile's exact model name.

Russia attacked Kharkiv with several missiles this week, killing two people and injuring over 60 in one of its biggest missile and drone strikes since the start of the large-scale war in February 2022.

North Korea has been under a United Nations arms embargo since it first tested a nuclear bomb in 2006.

U.N. Security Council resolutions – approved with Russian support – ban countries from trading weapons or other military equipment with North Korea.