"The network was not in control of the account once it was hacked and Twitter was unreachable until late morning eastern time yesterday," said Jeff Misenti, vice president and general manager of Fox News Digital, in a statement on Monday. "The tweets were taken down as soon as Twitter gave back control of the account to the network."

Misenti said he has asked Twitter to investigate how the incident occurred and to come up with a plan to prevent similar unauthorized access.

Twitter did not respond to a request for comment on the incident.

The Fox incident is just the latest Twitter account to be hijacked by hackers. Earlier this week, in fact, a U.K Twitter account of PayPal was taken over and was used to send angry tweets against the service.

In the , it took more than two hours for the tweets to be removed. It's not immediately clear whether PayPal was slow in notifying Twitter or the latter's response was slow.