Kyodo News on Monday sent a letter of protest to Perplexity AI Inc., accusing the U.S. startup of using its articles without permission to provide online responses generated by artificial intelligence for its web search engine and infringing the Japanese news agency’s copyright.

Kyodo said in the letter that Perplexity must immediately stop using its articles published on the website 47 News, which features articles created by Kyodo and its member newspapers, and compensate for damages resulting from the unauthorized use of Kyodo’s distributed articles, among other demands.