North Korea arrested four officials. This happened after a navy ship failed to launch. Their leader, Kim Jong Un, said it was their fault because they were not careful. This information came from the news.

North Korea does not often punish important people in public when their weapon tests or military shows fail. The arrest of four people shows that Kim is very serious about his military plans and wants to make people follow rules more strictly in the country.

On Wednesday, a big ship was damaged during a ceremony with Kim. A part at the back of the ship broke off when they were putting it into the water at Chongjin port. Pictures from space show the ship on its side with blue covers, and some parts are under the water.

Kim was very angry because the warship, which is the country's second destroyer, is very important for his plan to make his navy stronger. He quickly blamed military officers, scientists, and people who work at the shipyard. He said it was a "bad act" because they were very careless and did not do their job well.

On Monday, the Korean Central News Agency said that the police arrested Ri Hyong Son. He is a leader in the Workers Party and works in the department that makes weapons. Ri Hyong Son said he was very sorry because the rocket launch failed.

On Sunday, KCNA reported that three officials from Chongjin Shipyard were put in prison because of the incident. They were the main engineer, the head of the part that builds the ship's body, and the assistant manager for office work.

KCNA news said that Hong Kil Ho, the shipyard manager, was also called to answer questions.

On Thursday, North Korea's Central Military Commission told investigators that the people who did this bad thing will be punished. But we don't know what will happen to the officials they arrested.

When Kim first became leader, he was known for killing many important officials, including his uncle. People believe he did this to make his power strong and remove anyone who might threaten him. Recently, there have been fewer reports of killings or removals of people in North Korea. This is because Kim now has total power, like his father and grandfather had.

Kim has given special help to scientists and engineers who work on weapons. He wants to make more nuclear weapons and missiles. He gave them new apartments in Pyongyang. Last year, a military spy satellite did not launch well. After this, Kim told his scientists that he supported them. He said that "you need to fail to learn and succeed," according to state news.

Experts say Kim wants to make good progress with his five-year plan to develop weapons. He started this plan in early 2021. Kim also said that North Korea needs stronger navy ships, missiles that can carry nuclear weapons, and other modern weapons. He thinks these are needed because the U.S. and its allies are becoming more of a threat.

Last month, North Korea showed off its first destroyer, a big ship of 5,000 tons. It was a big event. The ship is North Korea's biggest and best warship. News said it can carry different weapons, like nuclear missiles. Kim said building it was a big step in making North Korea's navy better.

North Korea said that the second ship was not badly damaged. They said that the side of the ship had some scratches and a little water got into the back.

North Korea said on Friday that it needed about 10 days to fix the damage, but many people thought the damage was probably worse than they said.