The OSCE report (pdf) says:

Election day was generally procedurally well-organized and administered in an orderly manner but marked by a tense environment and several incidents of physical altercations and widespread intimidation of voters, as well as citizen observers. Voter identification (VID) and vote-counting devices (VCDs) were mostly operational, but the majority of voters in observed polling stations had difficulties operating the VCDs. Further, vote secrecy was potentially compromised in 24 per cent of observations, due to the manner of ballot insertion into VCDs or inadequate polling station layout. IEOM observers frequently reported indications of pressure on voters and overcrowding, and procedural inconsistencies.

In many cases, party representatives recorded the voting process and tracked voters, raising concerns about potential intimidation. While the presence of citizen and party observers contributed to transparency, many citizen observers appeared to act on behalf of contestants. During counting, procedural omissions included the improper handling of unused ballots, not announcing votes aloud and the IEOM noted inconsistencies in the determination of the validity of ballots. Tabulation was positively assessed, but the completeness and accuracy of results protocols was not consistently checked, with DECs citing that official results are finalized at the national level.

And here is another report.