As we were informed in a message, a DDoS attack is currently underway on two government websites, which appear to remain offline at the time of writing.
The sites are in the domains primeminister.gov.gr and startupgreece.gov.gr.
Both are subdomains of gov.gr where almost all government websites are hosted.
According to the Powerful Greek Army, the DDoS attack was carried out (and apparently continues to be carried out) in collaboration with the Greek hacking group @PhantomNations
Below you can see the screenshots that prove the DDoS 
When asked why they carried out these specific attacks, the PGA replied:
To see how good protection such popular government sites have, and they don't have any at all.
And a screenshot from startupgreece
