Main news of January 24

A roundup of what has happened in the past 24 hours

WORLD

* Russian President Dmitry Medvedev postponed his departure to the World Economic Forum in Davos, Switzerland, after a suicide bombing that killed at least 31 people at Moscow's Domodedovo International Airport

* Japan plans to develop economic cooperation with Russia, the country's prime minister, Naoto Kan, said

RUSSIA

* Moscow saw its second suicide attack in less than 12 months on Monday as a terrorist assault on the Russian capital’s busiest airport left over 30 dead

* Russian investigators lifted abduction charges against fugitive telecoms entrepreneur Yevgeny Chichvarkin after what has been widely viewed as a politically motivated case

* The foreign relations and defense committees of Russia's upper house of parliament recommended the chamber to approve the new arms reduction pact with the United States on Wednesday, the head of the committee said

* Russian prosecutors have not ruled out that a third criminal case may be initiated against ex-oil tycoon Mikhail Khodorkovsky and his former business partner Platon Lebedev, the Komsomolskaya Pravda daily said

* The Bereg Nadezhdy refrigerator vessel, stranded in ice in the Sea of Okhotsk since late December, has been successfully towed to clear water

DEFENSE

* Russia is expecting a reply from NATO to its proposals on building a European missile defense system, and will have to deploy a nuclear missile grouping if no agreement is reached, President Dmitry Medvedev said

SPORTS

* Ukrainian Deputy Prime Minister Boris Kolesnikov, the man in charge of preparations for Ukraine's joint hosting of Euro 2012, has suffered a heart attack, his spokesman said