The new title would likely elevate Kim to a level equivalent to his late father and grandfather, who held the title of general secretary of the Workers' Party
The two leaders reaffirmed their shared commitment to peaceful secularisation of the Korean peninsula and regional stability
North Korea has conducted a total of four nuclear tests, two of them since Kim came to power in late 2011
US troops at a border village were accused of trying to provoke North Korean troops with "disgusting acts"
The 62-year-old, who became a naturalised US citizen in 1987, was arrested on espionage charges back in October
The missile, believed to be a Musudan missile allegedly plunged back to earth seconds after launch from Wonsan on the east coast
Kim Jong-un is expected to use the event to cement his position as supreme leader and to take credit for pushing the nuclear weapons programme to new heights
The reported launch plans came two days after North Korea claimed to have successfully test-fired a ballistic missile from a submarine
However, South Korea's defence ministry said the launch appeared to have failed
Foreign Minister Ri Su Yong held firm to Pyongyang's longstanding position that the US drove his country to develop nuclear weapons as an act of self-defence
More than three quarters of North Korea's population remains 'food insecure and highly vulnerable to shocks', said a report
Numerous analysts have suggested the regime might carry out a fifth nuclear test as a display of defiance and strength
The council said that the launch violated UN resolutions even if it was a failure.
The attempt involved an intermediate-range Musudan missile
The launch is possibly scheduled for tomorrow, to mark the birthday of Kim II-Sung
More than 130 countries have confirmed to attend the Paris agreement ceremony on April 22.
The announcement came three days after Seoul revealed 13 North Koreans working at the same restaurant in a foreign country had defected to the South
The North has also threatened pre-emptive nuclear strikes against Washington and Seoul
Tensions have been rising on the Korean peninsula ever since the North conducted its fourth nuclear test on January 6
The plumes suggest buildings there are being heated, but it's unclear for what activity, said the website 38 North