The pictures from October last year show dead children with their heads cut open and the bodies of women with their internal organs spilling out of their torsos.
Wirathu said he put them up as a reminder to Buddhists that the country is under attack from Muslim “invaders”.
“Muslims are only well behaved when they are weak, ” he said. “When they become strong, they are like a wolf or a jackal, in large packs they hunt down other animals.”
Wirathu believes there is a Muslim “master plan” underway to turn Myanmar into an Islamic state.