YourAnonNews had just about 800,000 followers before it got suspended and was considered to be the face of Anonymous on Twitter. It seems that the account was disabled sometime around 11:30 AM EST as this was the time when another account used by Anonymous - Anonymous Operations (https://twitter.com/Anon_Central, posted a tweet saying that the account has been suspended.
There has been no official statement from Twitter about this suspension but, Anonymous has claimed through its Anon_Central account that Twitter has provided it with a reason for the suspension. Twitter has seemingly blocked the account because YAN was publishing private and confidential information about others.
We will update the story as and when we receive further information.