BBC News with Jerry Smit

The authorities in Mexico have discovered 49

mutilated

bodies dumped on a highway near the northern city Monterrey. Security officials say the bodies have been decapitated and have their hands cut off, making it difficult to identify them. Will Grant reports from Mexico City.

This latest massive killing is the third of its kind in Mexico a little more than a week. The gruesome discovery prompted a huge deployment of the police and the armed forces in the early hours of Sunday morning, as

forensic

teams worked to recover and identify the remains. At this early stage in the investigation, there is no indication of which group might have carried out the attack. But a similar event in 2010 in the state of Veracruz was blamed on fighting between the country's violent drug cartels, particularly the vast criminal network of Los Zetas.

The chief executive of the Internet giant Yahoo, Scott Thompson, is

stepping down

following accusation that he lied about having a computer science degree in his job application. He's being replaced for the time being by the firm's head of global media, Ross Levinsohn. Our Washington correspondent Jonathan Blake explains.

Scott Thompson has, it seems put information on his biography that turned out not to be true. He claimed to have an accounting and computer science degree, when in fact, he only has a degree in accounting. And Yahoo has, in the last few days, made it clear that that information was incorrect. What is not clear is whether he put it there deliberately or it came from somewhere else. Scott Thompson himself blames a