A lockdown at a nuclear processing site in South Carolina comes to an end after a security alert triggered by a bomb-sniffing dog.

US actor Emile Hirsch, star of Into The Wild, pleads guilty to assaulting a female film executive during the Sundance Film Festival.

Regional human rights investigators say they have been denied access to military personnel who may have witnessed the disappearance of 43 students in Mexico last September.

Iran wants to work with regional powers to promote peace and security after last month's nuclear deal, Vice-President Masumeh Ebtekar tells the BBC.

Thailand's defence minister says an attack on a Bangkok shrine that killed at least 21 people deliberately targeted foreigners.

The US government unveils a $5m (£3.2m) initiative to combat the use and trafficking of heroin amid a rising number of cases, especially in the north-east.

Oil and gas giant Shell has been granted the final permit it needs to begin drilling below the ocean floor for oil in the Arctic.

Botanists in the US say an ancient plant that grew underwater in what is modern day Europe may have been the world's first known flowering plant.