South Korea’s main opposition party on Monday slammed the country’s Unification Minister and called for his resignation after multiple news reports alleged the U.S. suspended its intelligence sharing in response to his public disclosure of a purported North Korean uranium enrichment facility.

“We are currently in a situation where intelligence sharing with the U.S. — one of the most critical assets for our national security — has been restricted. This is because of Unification Minister Chung Dong-young’s irresponsible remarks and President Lee Jae Mung, who is endorsing it through his silence,” People Power Party leader Jang Dong-hyuk said during a