Seoul says Pyongyang has not been supplying Iran with weapons in the hopes of being able to reopen diplomatic dialogue with the US.

North Korea appears to be distancing itself from longtime partner Iran in the hopes of forming a new relationship with the United States, South Korean intelligence believes.

Seoul’s National Intelligence Service (NIS) sees no signs that North Korea has sent weapons or supplies to Tehran since the US-Israel war on Iran began at the end of February, lawmaker Park Sun-won, who attended a closed-door briefing held by the NIS, said on Sunday.

While Iran’s other allies China and Russia have frequently issued statements on the US-Israel war on Iran, North Korea’s Foreign Ministry has only issued two toned-down statements so far, said the NIS.

While Pyongyang did condemn the US and Israeli attacks on Iran as illegal, it did not issue public condolences after Supreme Leader Ayatollah Ali Khamenei’s death or send a congratulatory message when Khamenei’s son, Mojtaba Khamenei, succeeded him.

The spy agency said Pyongyang is likely adopting this cautious approach to position it for a new diplomatic chapter with the US once the Middle East conflict subsides, said Park.

The NIS also told lawmakers that it now believes Supreme Leader Kim Jong Un is grooming his teenage daughter as his successor, citing a recent public display of her driving a tank.

The NIS said the imagery was intended to highlight the supposed military aptitude of the youngster, who is believed to be around 13 and named Ju Ae.

Such scenes are intended to pay “homage” to Kim’s own public military appearances during the early 2010s, when he was being prepared to succeed his father, Park said.

Kim’s powerful sister, Kim Yo Jong, was earlier thought to be a leading candidate to succeed her brother.

On Monday, she was in North Korean headlines as she welcomed an apology issued by South Korean President Lee Jae Myung on Sunday over a January drone incursion.

“The ROK [Republic of Korea] president personally expressed regret and talked about a measure for preventing recurrence. Our government appreciated it as very fortunate and wise behaviour for its own sake,” Kim Yo Jong said in a statement carried by the official Korean Central News Agency.

Seoul initially denied any official role in the January drone incursion, with authorities suggesting it was the work of civilians, but Lee said a probe had revealed government officials had been involved.

“We express regret to the North over the unnecessary military tensions caused by the irresponsible and reckless actions of some individuals,” Lee said.

Lee has sought to repair ties with North Korea since taking office last year, criticising his predecessor for allegedly sending drones to scatter propaganda over Pyongyang.

His repeated overtures, however, have gone unanswered by the North until now.

Lee’s expression of regret follows Kim’s labelling of Seoul as the “most hostile state” in a policy address in March in which he vowed to “thoroughly reject and disregard it”.