African countries say they are ending a boycott of meetings at U.N. climate negotiations after winning promises for more in-depth talks on greenhouse gas emissions. John Ash, the chairman of the negotiations on emissions, announced a deal has been struck with the Africans to devote most of the rest of this week's U.N. climate talks in Barcelona to rich nations' pledged targets on emission reductions. The group of some 50 African nations had complained that the targets so far submitted are too low, and that their continent has been suffering the most. Delegates to the Barcelona talks are preparing for next month's major U.N. climate convention in Copenhagen, Denmark. THIS IS A BREAKING NEWS UPDATE. Check back soon for further information....