BRUSSELS -- European Union ambassadors appear set to prolong asset freezes and visa bans against 146 individuals and 37 entities that, according to the EU, are responsible for actions against Ukraine's territorial integrity.

EU sources have told RFE/RL that the decision to prolong the measures by six months will be taken ahead of a September 15 deadline without much discussion.

The targets of the sanctions include companies in Crimea and various battalions formed by the Russia-backed separatists in eastern Ukraine, as well as Russian politicians like Deputy Prime Minister Dmitry Rogozin and Dmitry Kiselyov, a state media executive and presenter whom many regard as the Kremlin's chief propagandist.

The sanctions were first introduced in March 2014 after Russia's seizure and illegal annexation of Ukraine's Crimean Peninsula.

The EU's economic sanctions that target Russia's energy, military, and financial sectors are up for renewal on January 31.

EU sources told RFE/RL that those sectoral sanctions will be discussed at a Brussels summit of EU leaders in October.