Oil prices lingered above $54 a barrel Tuesday in Asia as growing investor optimism about the global economy left crude poised to break out of a month-long trading range.

A suicide car bomber killed four security forces and wounded passing schoolchildren Tuesday in Pakistan’s volatile northwest, where the government is under pressure from Washington to crack down on militants.

North Korea runs a cyber warfare unit that tries to hack into U.S. and South Korean military networks to gather confidential information and disrupt service, a news report said Tuesday.

President Barack Obama’s pledge to reduce and eventually eliminate nuclear weapons won praise Monday from China and key developing countries, and spurred hope that Washington’s policy shift and new U.S.-Russian cooperation will end a long deadlock on glob

A senior police official says a suicide car bomber has killed at least four paramilitary security forces in northwestern Pakistan.

The chief of Indonesia’s anti-corruption watchdog was arrested Monday and named a suspect in the murder of a prominent state company official, police and his lawyer said.

The Obama administration called hydrofluorocarbons widely used in refrigerators and air conditioners “a very significant” threat to climate change Monday, and expressed a preference for drastically reducing HFCs that are promoted under the U.N.’s ozone tr

Mexican officials angry about China’s decision to quarantine more than 70 Mexicans over swine flu fears sent a plane Monday to the communist country to bring its citizens back home. China sent its own plane to retrieve Chinese nationals stranded in Mexico

President Hamid Karzai chose a powerful warlord accused of rights abuses as one of his vice presidential running mates on Monday, hours before leaving for meetings in Washington with President Barack Obama and Pakistan’s president.

A Taiwanese business tycoon has criticized U.S. investor Warren Buffett’s decision to invest in a Chinese battery and car maker facing a lawsuit accusing it of stealing trade secrets.