SEOUL--North Korean leader Kim Jong Un’s disclosure of his daughter in recent public events was likely an attempt to show his people that one of his children would one day inherit his power in what would be the country’s third hereditary power transfer, South Korea’s spy service told lawmakers Thursday.

Kim publicly took his daughter to three events in the past few months: a missile launch site, a photo session with weapons scientists and a touring of a missile facility. State news media called her Kim’s “most beloved child,” sparking outside debate over whether she’s being groomed as his heir apparent, though she’s believed to be around 9 or 10 years old.

In a closed-door Parliamentary committee meeting, the National Intelligence Service said it believes that by taking his daughter to public places, Kim aims to show North Koreans his resolve to hold another round of hereditary power transition, Yoo Sang-bum, one of the lawmakers who attended the private NIS briefing, told reporters.

But the NIS said Ju Ae’s public appearance--the first for any of Kim’s children--doesn’t necessarily mean that she herself will succeed Kim, Yoo added.

South Korean news outlets have reported that Kim has three children--born in 2010, 2013 and 2017--and that the first child is a son while the third is a daughter.

In its earlier assessment after the daughter’s first appearance in November, the NIS told lawmakers that she is Kim’s second child, named Ju Ae, and is about 10 years old. The agency told lawmakers at the time that her unveiling at the missile launch site appeared to reflect Kim’s intentions to protect the security of North Korea’s future generations in the face of a standoff with the United States.

Ju Ae apparently is the child who retired NBA star Dennis Rodman saw during his trip to Pyongyang in 2013. After that visit, Rodman told the British newspaper the Guardian that he and Kim had a “relaxing time by the sea” with the leader’s family and that he held Kim’s baby daughter, Ju Ae.

Kim Jong Un, who turns 39 on Sunday, is the third generation of his family that has successively ruled North Korea since its 1948 foundation. He inherited power from his father Kim Jong Il upon his death in December 2011. Kim Jong Il took over when his father and state founder Kim Il Sung died in 1994.

The young Ju Ae’s appearance came as a huge surprise to long-time North Korea watchers; both Kim Jong Un and Kim Jong Il made public debuts after they became adults. In 2010, Kim Jong Il marked the then-26-year-old Kim Jong Un--his third and youngest son--as his successor by putting him in a series of high-ranking posts.

Kim Jong Un’s half-brother Kim Jong Nam, who was Kim Jong Il’s eldest son, was once seen as a potential heir to the country’s dynastic leadership until he publicly fell from grace in 2001 when he was caught trying to enter Japan on a fake passport to visit Tokyo Disneyland. In 2017, Kim Jong Nam was killed at a Malaysian airport after two Asian women smeared the lethal nerve agent VX on his face. South Korea’s spy service accused Kim Jong Un’s government of being behind the attack.

During Thursday’s briefing, the NIS also said former North Korean Foreign Minister Ri Yong Ho, who was involved in now-dormant nuclear diplomacy with the United States, has been purged, according to Youn Kun-young, another lawmaker who was at the meeting.

If true, it would be the highest-profile ouster by North Korea in recent years. In his earlier period of rule, Kim Jong Un engineered a spate of executions, purges and dismissals of senior officials, including the killing of his powerful uncle, in an apparent effort to solidify his grip on power.

Youn quoted the NIS as saying it has not yet determined whether Ri Yong Ho was executed. Yoo said the spy agency didn’t explain why Ri was purged.

Career diplomat Ri took part in the 2018-2019 nuclear summit with the United States over how to exchange North Korea’s denuclearization steps for economic and other benefits. After the second summit between Kim Jong Un and then-President Donald Trump collapsed in February 2019 in Hanoi, Vietnam, Ri called a middle-of-the-night news conference in which he declared that Washington had wasted an opportunity that “may not come again.”

South Korea’s spy agency has a spotty record of tracking developments in North Korea. Information about the secretive, authoritarian state is often impossible to confirm.

The NIS also told lawmakers that one of the five North Korean drones that recently violated South Korea’s airspace might have photographed South Korea’s presidential office in Seoul, Youn said. Earlier Thursday, South Korea’s military said the North Korean drone entered the northern end of a no-fly zone set up around the presidential office.

South Korea’s military has admitted it failed to shoot down any of the North Korean drones, which it said flew across the rivals’ border for the first time in five years. The failure caused security concerns in South Korea.

The NIS said North Korea has about 500 drones, including a small number of self-exploding drones, according to Yoo.

Observers say North Korea has a history of sending surveillance drones into South Korea. A suspected North Korean drone found in South Korea in 2014 also contained photos of South Korea’s presidential office, which was located at a different site in Seoul. Another suspected North Korea drone found crashed in 2017 was discovered to have photographed a U.S. missile defense system in South Korea.