Facebook Down For Second Time In Four Days

September 28, 2015 / 4:25 PM EDT / CBS New York

NEW YORK (CBSNewYork) -- Facebook has a case of the Mondays.

The world's biggest social network isn't being very social lately.

Facebook was down for about 90 minutes Monday.

Facebook also experienced a sporadic outage on Thursday.

The reason for the outage is not known at this time.

The Hashtag #ughfacebookdown was trending on another social network, Twitter.