The mines were domestically produced, according to the people familiar with the matter.Smetanin's statement follows Ukraine's Defense Ministry's announcement on Nov. 26 that it had been investigating the causes of the abnormal malfunction of the 120 mm mortar shells.As the defects were discovered, the ammunition was suspended in the Ukrainian Armed Forces, and the shells were seized for investigation.One of the manufacturing plants received a complaint about 120 mm shells from the Logistics Command of the Ukrainian Armed Forces on Nov. 20, according to Smetanin.The workgroup worked from Nov. 11 to 15 and concluded that several product components operated abnormally. As a result, some of the ammunitions were of poor quality.Smetanin added that in light of recent reports of mine malfunctions, the latest batches of manufactured arms were being re-tested.

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