A British daily has reported that North Korea is capable of conducting its third nuclear test after repairing flood-related damage at a nuclear test facility.
US defence officials said the "object" which was launched Wednesday has adopted an unstable trajectory, according to the Daily Mail.
China and North Korea on Saturday held their highest-level talks since Pyongyang staged a rocket launch that drew international censure.
South Korean voters have by and large ignored an impending rocket launch by North Korea scheduled for this week.
Two months ago, an Iranian rocket roared off a military launch pad and placed an Earth observation satellite into orbit.
As the US and its allies decry North Korea`s planned rocket launch, they`re also rushing to capitalize on the rare opportunity it presents to assess the secretive nation`s ability to strike beyond its shores.
The disputes in the S China Sea and N Korea`s planned rocket launch this month are top security worries to be featured in the summit.
Major earthquake rattles Nepal, India
Day in Pics: 25th April
Showbiz World - April 25, 2015