The European Union has agreed to impose sanctions on up to 20 senior Belarus officials suspected of election fraud and the crackdown on protesters and is likely to put President Alexander Lukashenko on its list at some point, the bloc’s foreign ministers said Friday at a meeting in Berlin, the Associated Press reports.

In Vienna, the Organization for Security and Cooperation in Europe offered to mediate between the two sides in Belarus, with chairman Edi Rama pledging not to “interfere in internal affairs,” but at the same time stressing human rights abuses must end.

Belarus’ authoritarian president of 26 years has faced weeks of protests since he was reelected to a sixth term on Aug. 9 with 80% of the vote. The opposition says the poll was rigged and the EU, among others, disputes the results.

In the first four days of demonstrations that followed, Belarus security forces detained almost 7,000 people and injured hundreds with rubber bullets, stun grenades and clubs. At least three protesters died. Around 180 people were detained at rallies on Thursday.