Russian President Vladimir Putin has sent a congratulatory telegram to Ilham Aliyev on the occasion of his re-election to the post of the president of Azerbaijan, the Kremlin press service said on Thursday.
Regular elections were supposed to be held in Azerbaijan in October 2018.
The Central Election Commission put the turnout at 74.5 percent. The current head of state scored 86% of the vote.
President Ilham Aliyev expressed gratitude for the attention and congratulations.
The main opposition parties in the tightly controlled Caucasus nation boycotted the vote, calling the elections a sham and accusing the authorities of electoral fraud.
But authorities rejected the criticism, insisting the vote was free and fair.
Aliyev, 56, has led Azerbaijan since 2003.
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The early presidential election in Azerbaijan took place within a restrictive political environment and under laws that curtail fundamental rights and freedoms, which are prerequisites for genuine democratic elections.
The ruling New Azerbaijan Party claimed Aliyev's victory two of hours after polls closed.
Since Aliyev won the last election in 2013, Azerbaijan's constitution has been amended to extend the presidential term from five to seven years.
In his letter, the Kazakh leader hailed the great contribution President Ilham Aliyev made to the strengthening of relations between the two countries which are based on strong friendship and trust.
Critics believe that the seven opponents that were allowed to run in the contest-the CEC did not accept the applications of seven other, better-known opposition politicians-are in essence puppets affiliated with Aliyev and the government.
Worldwide observers from the Organisation for Security and Cooperation in Europe were to release their assessment of the elections' conduct later on Thursday.