SEOUL, South Korea — Russian President Vladimir Putin is ready to meet with North Korean leader Kim Jong Un “at an early date,” the North’s state media reported Wednesday, amid a rapid diplomatic thaw on the peninsula.

Putin invited Kim and the South’s President Moon Jae-in in June to an economic forum in Vladivostok next month, although it is not known whether the North Korean leader responded to the invitation.

In a message to Kim on the North’s National Liberation Day — marking the end of Japanese rule over Korea at the end of World War II — Putin reiterated his intention for a summit.

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“I affirm that I am ready to meet you at an early date to discuss urgent issues of bilateral relations and important matters of the region,” Putin said in a message carried by the North’s official Korean Central News Agency.

The message did not offer a specific date for the meeting.

Putin expressed hopes to further develop “reciprocal cooperation including the realization of the tripartite project” that would also involve South Korea.

In his daily briefing for journalists on Wednesday, Kremlin spokesman Dmitry Peskov confirmed Putin sent the telegram in which he “stressed his desire and readiness to establish a dialogue.”

Asked about a possible meeting between the two leaders in Vladivostok, Peskov said the economic forum is “open for all the leaders of the region” but added that Moscow has “so far” not received confirmation from Pyongyang that Kim Jong Un will attend.

Kim also sent a message to Putin, KCNA reported, noting the “valuable tradition” of their joint wartime struggle against Japan was the “strong roots” of their bilateral relations.

The message gave no response to Putin’s invitation, although KCNA did not make it clear if Kim’s message came before or after the letter from Moscow.

The rapid diplomatic thaw on the Korean Peninsula since the Winter Olympics has seen Kim meet with his South Korean counterpart Moon Jae-in twice, as well as Chinese President Xi Jinping and US President Donald Trump.