No problem accessing the account. No mention of being blocked or suspended or cancelled.
They reinstated it.
“We’re back! No hackers, no rogue employees. We had a technical glitch and we appreciate the Twitter team’s help in bringing us back online. Stay tuned here for more great news about the work that the men and women of ICE do every day to protect the homeland.”
https://twitter.com/ICEgov/status/1326995082495537152