A Dutch architectural firm's design for a pair of towers in South Korea is sparking debate because some believe they resemble the Twin Towers on the day of the 9/11 terrorist attacks.

MVRDV's Cloud project was scheduled to be completed in Seoul, South Korea, by 2015. The two luxury high-rises would be connected by a "cloud" on the 27th floor. The cloud would feature an atrium, wellness center, pools, restaurants and cafes.

But some believe the cloud resembles the explosions created after two planes hit the Twin Towers on 9/11.

The company posted to its Facebook page that it regrets any thoughts that its project reminded people of those images.

"It was not our intention to create an image resembling the attacks nor did we see the resemblance during the design process," the company posted. "We sincerely apologize to anyone whose feelings we have hurt, the design was not meant to provoke this."

More than a thousand people commented on the post, many upset with the design.

"I was so upset when I saw this design. It looks exactly like the Towers as the planes (full of innocent people) crashed through them," wrote Allison Parr.

"That's too bad that no one in your firm was smartest to even realize that you were being offensive," wrote Tommy Falasz.

Others were more understanding.

"It's just a building design stop being so paranoid," wrote Emilee Flanders.

"I like the building, I'm American, I think it's creative and having lived in Korea and planning on going back I can't wait to see it. Nice work. I totally get the cloud concept," wrote Joe Samuelson III.

The company said the design was inspired by drawing of a cloud covering the center of two skyscrapers.