ZURICH (Reuters) - Nuclear proliferation watchdog CTBTO said on Saturday it had detected two seismic events in North Korea on Saturday but they were probably not deliberate explosions in the isolated country.  Two #Seismic Events! 0829UTC & much smaller @ 0443UTC unlikely Man-made! Similar to  collapse  event 8.5 mins after DPRK6! Analysis ongoing,  CTBTO Executive Secretary Lassina Zerbo said in a Twitter post. China s earthquake administration said it had detected a magnitude 3.4 earthquake in North Korea that was a  suspected explosion , while an official at South Korea s meteorological agency said the initial view was that it was a natural quake. 
Two seismic events in North Korea unlikely man-made: CTBTO