FILE - In this July 27, 2013 file photo, North Korean leader Kim Jong Un leans over a balcony and waves to Korean War veterans cheering below at the end of a mass military parade on Kim Il Sung Square in Pyongyang to mark the 60th anniversary of the Korean War armistice. North Korea’s announcement that it is mass producing a home-grown smartphone has been met with skepticism in the tech industry. The North’s state media early August, 2013, showed leader Kim Jong Un inspecting “Arirang” phones at a Pyongyang factory. (AP Photo/David Guttenfelder, File)

Seoul -

North Korean leader Kim Jong-un moved to reassure the public over construction safety after the deadly collapse of a Pyongyang apartment building sparked a rare apology from the secretive hardline state.

Inspecting a riverside construction site in Pyongyang where two 46-storey apartment buildings are being built by soldiers, he stressed the need for quality construction in the aftermath of the May 13 accident that state media blamed on “irresponsible” supervision by officials.

The official Korean Central News Agency on Wednesday quoted Kim raising the slogan: “Let us take responsibility for the safety of the project and guarantee its absolute quality for all eternity.”

Kim's inspection tour appeared aimed at reinforcing his regime's commitment to regulate building construction after senior North Korean officials offered a rare public apology for the “unimaginable” disaster on May 13.

No death toll was given, but South Korean officials said close to 100 families were in residence at the site. The North's state media said Kim “sat up all night, feeling painful” after being told about the accident.

About 2.5 million people - mostly the ruling elite or those considered politically trustworthy - live in Pyongyang and enjoy priority access to electricity, food and other goods and services.

The North in 2009 announced plans to build 100 000 new high-rise apartments in its showpiece capital. Students and soldiers were drafted in to help complete the project on time.

Kim - since taking power after the death of his father Kim Jong-il in December 2011 - has launched a flurry of high-profile construction projects of his own.

He last year celebrated the opening of a new water park, an equestrian club and apartments for scientists, teachers and athletes in the capital, and a massive ski resort in the north-east. - Sapa-AFP