"I have prepared in different ways and I have an axe here in case someone should manage to get in through the window," Vilks said.
Vilks said he had received threatening phone calls from Somalia at the beginning of the year and that the Swedish security police, Säpo, had since warned him there was a heightened threat level against him.
"But I didn't think it was that serious," he told TT.
Säpo spokesperson Mattias Lindholm told AFP news that the agency was informed about the international operation leading up to Tuesday's arrests.
"We have cooperated ... Right now we are in continuous touch with the authorities involved, including our Irish counterparts," he said but refused to comment on the threats against Vilks or on Säpo's actions to protect him.