Russia has banned all dairy imports from Ukraine, citing a lack of quality control.
The move is the latest sign of worsening trade relations between the two countries after Ukraine signed a free-trade pact with the European Union.
A spokesman for Russia's food and agricultural inspection service, Rosselkhoznadzor, said the ban was imposed after high levels of antibiotics and bacteria were detected in Ukrainian dairy products.
The ban comes into effect on July 28.
Russia has previously imposed import bans on countries seeking to move closer to the European Union and away from Moscow.
Earlier this month, Russia banned meat and fruit imports from Moldova, which also signed an EU Association Agreement in June.
Darkness and queues on ferry await Crimea
Disabled ATO soldiers proved their strength
"My Ukraine" on canvas of artist
Largest entertainment park for children opened in Kyiv
Power outages began in Crimea
Defendant in "Hizb ut-Tahrir" case missed birth of daughter
Chubarov: Mogilev fled from Crimea, when we fought for it
IS Militants shot nearly 300 people in Mosul
Merkel predicts sanctions against RF for actions in Syria
ATO Headquarters: Militants used Grads in Luhansk direction
Egypt resold "Mistrals" to Russia for $ 1
Russia refused to release Kolchenko and Sentsov to Ukraine
Dzhemilev and TİKA opened the Crimean Tatar cultural center
RF Cabinet of Ministers ‘snips’ Black Sea
Court considered case of Mejlis member Zeynur Yakubov in Cr
Putin's sinister image
Road map plan to ensure security in Donbas
Prosecutor of ATO forces charged with illicit enrichment
Crimea-SOS announces rally in support of kidnapped in Crimea
Scary and amazing, leading to the world of the unconscious: exhibition of masks
Italy hinders introduction of new sanctions against Russia
Incidence of tuberculosis in Crimea is higher than in Russia
Umerov received 2 examination results from FSB
Putin feared to see NATO ships in Sevastopol
Russia refused to return control of Debaltsevo to Ukraine