Gmail account appears fully operational now, and the suspension appeared to be active for only around 20 hours. During account suspension time I wasn’t able to download attachements, but was able to read email and view attachment previews.
The reason for the suspension appears to be a massive burst of emails with attachements from other gmail users – Even though I cannot confirm that this is the only true reason, it is the only anomality I’ve noticed when I was notified of the “Lockdown in Sector 6″.