A genocide museum in Cambodia has decided to ban "Pokemon Go" after tourists were spotted playing the popular game there.

Chhay Visoth, director of the Tuol Sleng Genocide Museum, said Wednesday that signs were posted both outside and inside the museum banning the game that was introduced to Cambodia last weekend.

In addition to the banning, Visoth said he had assigned staff and guides to watch out for any violations of the new rule after a few foreign tourists and a Cambodian man on his first visit to the site were reportedly seen playing on Tuesday.

Many Cambodians expressed agreement that playing such a game inside the genocide museum is inappropriate.

Chhang Youk, director of the Documentation Center of Cambodia, which archives the Khmer Rouge atrocities, and Bou Meng, a survivor of the Tuol Sleng prison, both said they opposed anyone playing the game there.

The Tuol Sleng museum is a former prison, then known as S-21, where more than 12,000 people were tortured and killed during the Khmer Rouge rule from 1975 to 1979.