WASHINGTON, June 19 (Reuters) - U.S. Special Presidential Envoy Marshall Billingslea will travel to Austria on Monday and Tuesday to discuss "mutually agreed topics related to the future of arms control" with Russian Deputy Foreign Sergei Ryabkov, the U.S. State Department said on Friday.

"The United States has extended an open invitation to the People's Republic of China to join these discussions, and has made clear the need for all three countries to pursue arms control negotiations in good faith," the State Department said. (Reporting by Mohammad Zargham; Editing by Sandra Maler)