60 doctors and other medical staff who had gathered for a rally were taken to police stations.
The reburial of Shmuel Yefimovich Plavnik, better known by his pen name Zmitrok Byaduli, took place on Tuesday at a Christian cemetery in Minsk.
Evo Morales resigned when an investigation by the Organization of American States reported that there had been “serious irregularities” in the vote and “clear manipulations” of the voting system.
"Interior affairs servicemen and the interior troops will not leave the streets and, if necessary, will use special equipment and live ammunition."
Belarus has accused the two countries of meddling in its affairs by hosting exiled opposition leaders and refusing to recognize Alexander Lukashenko's victory.
Belarusian police have used water cannon mounted on armoured police vehicles to disperse protesters and detained scores of protesters.
EU diplomats say a solution could involve a promise to Cyprus of tough sanctions on Turkey in the future.
Belarusian security forces began detaining people on Sunday as tens of thousands of protesters gathered in Minsk for the seventh straight weekend.
One group of women chanted "Our president is Sveta!" - referring to opposition politician Sviatlana Tsikhanouskaya who they say won the vote - before riot police dragged many of them into vans.