The US president's comments come amid uncertainty over whether Iran will attend peace talks in Pakistan this week.

John Ternus will take over running the technology giant as Cook steps up to become executive chairman.

Several people were also injured in the incident on Monday at the popular tourist site, say Mexican officials.

The Israeli military says it views with "great severity" the actions of the soldier, as the US ambassador demands "swift" consequences.

Prosecutors say the singer, real name David Anthony Burke, could face life in prison due to the nature of the case, if convicted.

Japan's meteorological agency warns another, stronger earthquake may hit in the next week.