sentence1: A reward of $2m (£1.37m) each will be paid to informers who help arrest Mexico's 24 most-wanted drug gang chiefs, the attorney general has said. Correspondents say the most-wanted list is a public challenge to the cartels. Some 8,000 people have died in the past two years, as drug gangs fight for territory amid government crackdowns. US and Mexican agencies are increasing their co-operation as the gang violence spills over the border, where kidnaps and killings are on the rise.
sentence2: The reward for informers in Mexico is 2 million dollars.