Trading was unexpectedly halted on the floor of the New York Stock Exchange Wednesday morning.
In a brief statement immediately after the halt, which happened around 11:32 a.m. ET, the NYSE wrote, “NYSE/NYSE MKT has temporarily suspended trading in all symbols. Additional information will follow as soon as possible.”
Trading was still halted as of 12:30 p.m. ET.
In a longer statement issued just after noon, Marissa Arnold, an NYSE spokeswoman, said, “We will be providing further updates as soon as we can, and are doing our utmost to produce a swift resolution, communicate thoroughly and transparently, and ensure a timely and orderly market re-open.”
Earlier, the NYSE tweeted:
Early indications are that a computer problem or glitch is the cause; CNBC and others used the term “technical issue.” And coincidentally, United Airlines had to ground all flights for an hour this morning due to computer issues as well.
Two U.S. officials told NBC News that there was “no indication that computer issues at NYSE & [United] are related or a cyberattack.”
All open orders from before the trading halt were cancelled. Meanwhile, NYSE stocks can still be traded on other exchanges right now, including the Nasdaq, which seized the opportunity, in a sense, on Twitter:
This story originally appeared on Fortune.