On 31 May Armenia related news outlets and various Internet resources will have a special working schedule to cover crucial Yerevan mayor election - “local elections of national importance”, as rightly indicated by BBC Russia.
Below are my recommended sources to follow news as/when they happen during the election day.
Online news outlets:
Radio Liberty (RFE/RL) - Armenia
I will post updates on my Twitter page http://twitter.com/unzippedblog. As/when necessary, blog entries will appear here on Unzipped too.