Ai Weiwei has posted a number of pictures of what he says are listening devices found in his Beijing studio.
The Chinese dissident artist captioned one photo of a bug on Instagram with "There will always be surprises".
His friend Liu Xiaoyuan confirmed the bugs were found after the artist returned from a trip to Germany.
Xiaoyuan tweeted that they were found when redecoration started on Ai's home and were found in the office and a living room.
The artist also posted a video clip of firecrackers being set off in a metal bucket next to one of the devices. He wrote "Did you hear it?" next to the video. more