Kuala Lumpur (AFP): Malaysian officials on Monday slammed a tattoo exhibition held in the country as "porn" unsuitable for a Muslim-majority country, after images of half-naked men and women went viral.

The "Tattoo Malaysia Expo" in the capital Kuala Lumpur attracted people from all over the world, and photos circulating online showed many heavily-inked participants wearing few clothes in order to display their designs.

The tourism minister had initially supported the three-day show which ended Sunday but after seeing the pictures said it did not reflect the Southeast Asian nation's "polite and decent" culture.

"It is impossible for the ministry to approve of any programme that contains porn such as this," Tourism Minister Mohammadin Ketapi said in a statement.

"This is not Malaysian culture, the majority of the population are Muslims."

He ordered a probe and warned the government could take legal action against the organisers.

Authorities added they had not given approval for "half-naked parades" and international tattoo shows previously held on the Malaysian part of Borneo island did not include any nudity.

Some 60 percent of the country's 32 million people are Muslim, but critics say that a traditionally tolerant brand of Islam has been eroded by creeping religious conservatism.

Government officials tend to be conservative, and rights groups say minority groups ranging from Muslim Shiites to gays face growing pressure from authorities.