In February, North Korea's ambassador to the United Nations, Kim Song, issued an unusual appeal for urgent food assistance.
Kim has accused Washington of acting in "bad faith", and given it until the end of the year to change its approach.
The tests came five days after North Korea fired multiple short-range projectiles into the East Sea from Wonsan.
There remains some uncertainty over what was tested.
If it's confirmed that the North fired banned ballistic missiles, it would be the first such launch since the North's November 2017 test of an intercontinental ballistic missile.
Doan Thi Huong from Vietnam and Indonesian national Siti Aisyah were arrested after being spotted on CCTV approaching Kim, but they always denied murder. Doan Thi Huong from Vietnam and Indonesian nat
The sale of luxury goods like limousines, is banned in North Korea under UN sanctions intended to put pressure on North Korea to abandon its nuclear weapons.
The summit in Russia came with Kim locked in a nuclear stand-off with Washington and Putin keen to put Moscow forward as a player in another global flashpoint.
Russia said that the focus will be on a political and diplomatic solution to the nuclear problem on the Korean Peninsula.
The first-ever Kim-Putin summit comes after the breakdown of Kim's meeting with United States President Donald Trump in Hanoi in February.
The test comes during an apparent deadlock in nuclear disarmament talks after the failed summit in Hanoi between Kim and President Donald Trump earlier this year.
Kim blamed the collapse of his summit with Trump in February on what he described as unilateral demands by the United States, which he said raised questions over whether Washington has genuine willing
The Hanoi summit fell apart as Kim and Trump failed to find common ground over how to match Pyongyang's denuclearization steps with Washington's sanctions relief.
Trump and Kim held their first landmark summit in Singapore last June, where the North Korean leader signed a vaguely-worded deal on the "denuclearisation of the Korean peninsula.
Donald Trump orders withdrawal of sanctions against North Korea immediately after Treasury imposes them
President Trump's unusual move comes after his second summit with Kim, held last month in Hanoi, Vietnam.