He was freed on appeal, but on Friday a higher court ordered that he should stay behind bars. Kocharian's lawyer said he walked to jail without waiting for police to escort him there.
In April, due to term limits, Sargsyan shifted into the prime minister's seat in what was seen as an attempt to cling to power. But he stepped down after just six days in office in the face of massive protests organized by Pashinian, who then took the prime minister's post.
Wiretaps released earlier this week had Pashinian discussing Kocharian's arrest with the nation's top security official. Pashinian denounced the released recordings as a "declaration of war" by his political foes.
Pashinian has called an early parliamentary election for this Sunday in a bid to win control of parliament, which is still dominated by members of Sargsyan's Republican Party. Pashinian's party is expected to sweep the vote. (AP) IND
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