South Korea announced on Tuesday that it will fully participate in a U.S.-led nonproliferation campaign, one day after the Democratic people's Republic of Korea (DPRK) conducted its second nuclear test.
A spokesman of the South Korea's foreign ministry said that Seoul fully joins the Proliferation Security Initiative (PSI) from Tuesday.
South Korea made the decision to join the PSI following DPRK's April 5 rocket launch, but it had delayed a formal announcement.
Government officials said that there was no reason to wait any longer as Pyongyang carried out another nuclear experiment on Monday.
The PSI is aimed at stopping the trafficking of weapons of mass destruction. South Korea will be its 95th member.
The DPRK has repeatedly warned that the South Korea's participation in the PSI would be tantamount to a declaration of war.