Read Related Posts: (OurMine)
Followers started seeing below tweet
“Hey its “Our Mine” We are just checking your security, Please contact us for more information”
Followed by two other tweets
“Hannah, Just contact us we will stop tweeting”
Who is Hannah, we are not able to identify as per our best guess it is the original name of the account holder in Profile.
OurMine hackers are known for compromising accounts but they return to their rightful owners soon they are contacted.
As the time of writing, the account is restored & returned to NATGEO.