North Korea's foreign minister, Choe Son Hui, is on her way to Moscow, state media KCNA and Russian officials said on Tuesday, for her second trip to Russia in six weeks amid rising concerns about Pyongyang's involvement in Moscow's war in Ukraine, Reuters reported.

KCNA said a delegation led by Choe left on Monday for an official visit to Russia, without elaborating.

Russia's ambassador to Pyongyang, Alexander Matsegora, saw off Choe at the airport, the Russian embassy said in a statement posted on the embassy's Vkontakte social media page.

"The visit of the head of the DPRK Foreign Ministry to the Russian Federation is taking place within the framework of a strategic dialogue - following an agreement to enhance ties reached by the leaders of our countries during the June 2024 summit," the statement said.

DPRK stands for North Korea's official name, the Democratic People's Republic of Korea.

During a televised cabinet meeting, South Korean President Yoon Suk Yeol said "illegal" military cooperation between Russia and North Korea posed a serious threat to the international community, read the report.

"I want everyone to be on alert about risk management," Yoon told the meeting.

Choe's visit comes as NATO joined Seoul, Washington and Kyiv in confirming Pyongyang's dispatch of troops to Russia, saying that North Korean military units had been deployed to Russia's Kursk region on the border with Ukraine.

The Pentagon said on Monday that Washington would not impose new limits on Kyiv's use of American weapons if North Korea entered Moscow's war against Kyiv. It also said that North Korea had sent 10,000 troops to eastern Russia for training, up from its estimate of 3,000 on Wednesday.

U.S. President Joe Biden called the situation "very dangerous".

NATO Secretary-General Mark Rutte, after a meeting on Monday with a South Korean delegation, said the deepening military ties between Moscow and Pyongyang posed a threat to both Indo-Pacific and Euro-Atlantic security, Reuters reported.

South Korea's president, in a phone call with European Commission President Ursula von der Leyen, said the deployment of North Korean troops to the front lines of the war in Ukraine may come sooner than expected.

Since the meeting of North Korean leader Kim Jong Un and President Vladimir Putin in Russia's Far East last year, North Korea and Russia have upgraded their military ties. They met again in June this year to sign a comprehensive strategic partnership that includes a mutual defence pact.

Egypt has proposed an initial two-day ceasefire in Gaza to exchange four Israeli hostages of Hamas for some Palestinian prisoners, Egypt's president said on Sunday as Israeli military strikes killed 45 Palestinians across the enclave.

Egyptian leader Abdel Fattah al-Sisi made the announcement as efforts to defuse the devastating, more than year-long war resumed in Qatar with the directors of the CIA and Israel's Mossad intelligence agency taking part, Reuters reported.

Speaking alongside Algerian President Abdelmadjid Tebboune during a press conference in Cairo, Sisi also said that talks should resume within 10 days of implementing the temporary ceasefire in efforts to reach a permanent one.

There was no immediate comment from Israel or Hamas but a Palestinian official close to the mediation effort told Reuters: "I expect Hamas would listen to the new offers, but it remains determined that any agreement must end the war and get Israeli forces out of Gaza."

Israel has said the war cannot end until Hamas has been wiped out as a military force and governing entity in Gaza.

The U.S., Qatar and Egypt have been spearheading negotiations to end the war that erupted after Hamas fighters stormed into southern Israel on Oct. 7 last year, killing 1,200 people and taking more than 250 hostages, by Israeli tallies.

The death toll from Israel's retaliatory air and ground onslaught in Gaza is approaching 43,000, Gaza health officials say, with the densely populated enclave in ruins.

An official briefed on the talks told Reuters earlier on Sunday that negotiations in Doha will seek a short-term ceasefire and the release of some hostages being held by Hamas in exchange for Israel's release of Palestinian prisoners.

The objective, still elusive after multiple mediation attempts, is to get Israel and Hamas to agree to a halt in fighting for less than a month in the hope this would lead to a more permanent ceasefire.

At least 43 of those killed in Gaza on Sunday were in the north of the enclave, where Israeli troops have returned to root out Hamas fighters who it says have regrouped there.

Iranian officials should determine how best to demonstrate Iran's power to Israel after the Israeli attack on Iran two nights ago, Iran's official IRNA news agency cited the country's Supreme Leader Ayatollah Ali Khamenei as saying on Sunday.

"The evil committed by the Zionist regime (Israel) two nights ago should neither be downplayed nor exaggerated", IRNA cited Khamenei as saying, Reuters reported.

Iran on Saturday played down Israel's overnight air attack against Iranian military targets, saying it caused only limited damage, as U.S. President Joe Biden called for a halt to escalation that has raised fears of an all-out conflagration in the Middle East.

Scores of Israeli jets completed three waves of strikes before dawn against missile factories and other sites near Tehran and in western Iran, Israel's military said.

Khamenei said Iran's power should be demonstrated to Israel, adding that the way to do so should be "determined by the officials and that which is in the best interest of the people and the country should take place".