South Korea's foreign ministry has summoned the Russian ambassador in Seoul in protest over what it has said is the dispatch of North Korean troops to the country for deployment in Ukraine, the Yonhap news agency reported on Monday.
Georgy Zinoviev, the top Russian envoy to Seoul, told Yonhap that he met with South Korea's first vice foreign minister Kim Hong-kyun earlier on the day, according to the news agency.
South Korea's foreign ministry said it called for the immediate withdrawal of North Korean troops from Russia.
South Korea's spy agency said last week that North Korea had shipped 1,500 special forces troops to Russia's Far East for training and acclimatising at local military bases and will likely be deployed for combat in the war in Ukraine.
The White House National Security Council could not confirm reports that North Korean troops were fighting for Russia, a spokesperson said on Friday, but if true, "this would mark a dangerous development in Russia’s war against Ukraine".
Russia and North Korea both deny they have engaged in arms transfers. The Kremlin has also dismissed South Korean assertions that North Korea may have sent some military personnel to help Russia against Ukraine.
A total of 43 reports of missing persons have been filed at police headquarters in Huelva, Madrid, Málaga, Córdoba and Seville on Tuesday, with at least 40 people dead after a high-speed train derailed and collided with an oncoming one on Sunday night.
Dozens of beaches along Australia's east coast, including in Sydney, have closed on Tuesday after four shark attacks in two days, as heavy rains left waters murky and more likely to attract the animals.
An explosion tore through a Chinese-run restaurant in a hotel in a heavily guarded part of Afghanistan's capital on Monday, killing a Chinese national and six Afghans and injuring several others.
The death toll from Sunday's collision between a derailing high-speed train and a second oncoming train in southern Spain has risen to 39, with 152 people injured, state broadcaster RTVE reported on Monday, citing police sources.
Pakistani firefighters began pulling bodies from the smouldering remains of a sprawling Karachi shopping mall on Monday where more than 60 people were still missing after a massive fire that killed at least 21.