Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.

U.S. Strategic Command made an unexpected joke in a now-deleted Twitter post about American military might on Monday in its New Year's Eve message.

Noting the "big" Times Square ball drop celebration at midnight, the unified command's account tweeted, "if ever needed, we are #ready to drop something much, much bigger."

A tweet that was deleted by U.S. Strategic Command. @us_stratcom

The joke was followed by a slickly produced video of stealth jets with the words "stealth, ready, and lethal" flashing across the screen. The tweet encouraged followers to "watch to the end!" If you do, you'll see two bombs released from a plane, followed by several massive explosions.

Let our news meet your inbox. The news and stories that matters, delivered weekday mornings. This site is protected by recaptcha

The tweet was later deleted, and a subsequent tweet from the unified command's account said the first was "in poor taste & does not reflect our values. We apologize."

Our previous NYE tweet was in poor taste & does not reflect our values. We apologize. We are dedicated to the security of America & allies. — US Strategic Command (@US_Stratcom) December 31, 2018

A spokesman said the video shows test footage of non-nuclear bombs.

"This post, which has since been deleted, was part of our Year in Review series meant to feature our command priorities: strategic deterrence, decisive response and combat-ready force. It was a repost from earlier in the year, dropping a pair of conventional Massive Ordnance Penetrators (MOP) at a test range in the United States," a spokesman told NBC News this evening.

MOPs are massive bombs designed to take on bunkers and concrete buildings.

The unified command, which is part of the Department of Defense and whose slogan is "peace is our profession," readies and controls the nation's nuclear arms, among other things. It wasn't clear if the "something much, much bigger" was a reference to conventional bombs or the country's nukes, though many interpreted it to be about the latter.

Twitter users responded to the New Year's Eve message with a mix of confusion and unease.

"Are we freaking BOMBING tonight????" one user asked.

Maybe a little more "Happy New Year!" and a little less "Watch the our powerful bombs our powerful bombs of mass destruction." — Dani Bostick (@danibostick) December 31, 2018

This is not the first military tweet this year to raise eyebrows.

When an audio clip went viral because some heard "yanny" while others heard "laurel," the U.S. Air Force tweeted that the Taliban would have preferred to hear either word over gunfire. They later apologized and deleted the tweet.