North Korea might have recently conducted dummy missile ejection tests at its Sinpo South Shipyard.
U.S.-based North Korea monitoring website, 38 North cited commercial satellite imagery from April 5th which showed the support structure pulled back from its static position indicating North Korea might have had an ejection testing.
During such tests, dummy missiles are ejected, often at different angles.
The report added, while it can't confirm the purpose of the test, it's likely for reliability testing.
North Korea has launched eight missiles so far this year. all of them last month.