Promotional screens on a central Auckland store were hacked to show pornographic content on Sunday morning.

Staff at the Asics store, on Shortland St, confirmed the screen had been hacked but said they could not make any further comments about the inappropriate content that appeared above the store's entrance.

Asics brand manager Greig Bramwell confirmed the store had been the target of a "cyber security breach" in the early hours of Sunday.

"We are currently investigating the situation and working to make sure it cannot happen again in the future.

"We sincerely apologise to those who saw the content," Bramwell said.