WASHINGTON, April 26 (Reuters) - President Joe Biden and South Korean leader Yoon Suk Yeol are expected to agree on Wednesday to deepen collaboration meant to deter nuclear escalation by North Korea amid heightened anxiety about its growing arsenal of missiles and bombs, U.S. officials said. The Republic of Korea is South Korea's official name. The officials stressed that no U.S. nuclear weapons would be returned to the peninsula, and South Korea would continue not to have control over the U.S. nuclear arsenal. South Korea will also reaffirm its commitment to the nuclear non-proliferation treaty and its non-nuclear status, they said. It is only the second state visit Biden has hosted since he took office two years ago - the first such guest was France's president.

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