This story was updated at 1:05 p.m. ET.
Facebook went down for some users Thursday, but appears to be back up and running for others. The website "Is it Down Right Now?" lists Facebook as having "service disruptions."
Visitors to Facebook.com were greeted by the message, "Sorry, something went wrong" instead of the usual Facebook homepage when visiting on the web, starting at about 12:30 p.m. Eastern Time on Thursday. Facebook's mobile apps didn't appear to be affected.
Facebook's app status dashboard shows a "major outage" beginning at approximately 12:30 p.m. ET. The service reports its key Facebook Graph API -- the core software that apps use to read and write to Facebook -- became unavailable at that time.
Users turned to Twitter to complain about the outage:
facebook is down :( how will i procrastinate now :(— Taylor! (@_uncivilized) September 24, 2015
MEIN GOTT! Facebook ist down. Das wird so vielen Menschen die Chance geben schlechte "Gefällt dir das" Witze über WhatsApp zu verschicken...— Kai (@KaiTGR) September 24, 2015
Facebook is down as soon as the Pope gets to NYC...— Ramya (@ramyavelury) September 24, 2015
Facebook was down... So the world flocked to Twitter to whine about it. #facebookdown— Leah Kozak (@leahjeanviolet3) September 24, 2015
#Facebookdown Kim Jong-un stop playing on that computer !!! You are interfering #Facebook !! pic.twitter.com/23yMQJq3Tm— ♪♫♥Letty©♥♫♪ (@LettyLandheer) September 24, 2015
Facebook representatives didn't immediately respond to a request for comment.