In a rare public acceptance of responsibility, the North Korean government announced Sunday that an apartment building under construction in its capital of Pyongyang collapsed, potentially killing hundreds of people. The collapse occurred last week, and rescue operations were suspended Saturday, according to state news agency Korean Central News Agency.Analysts said North Korea's disclosure of the accident may be intended to draw a contrast toSouth Korea's response to the deadly ferry accident in April that killed hundreds of people, many of them students.