From PTI (where I get all my news):

Copenhagen: India and China have taken a united stand and walked out of the climate summit as Copenhagen talks fail.
Tensions prevailed at the climate talks at Copenhagen today, as Indian prime minister Manmohan Singh and China premier Wen Jiabao walked out of the summit along with their respective delegations, as talks failed.
The principle of common but differentiated responsibility must be adhered to and developed countries must honour their commitments, Chinese premier Wen Jiabao said at the climate meet.
He also said that China takes the issue of climate change “very seriously”, and regards it as an important strategic task. He vowed that China will not only achieve but exceed its voluntary climate action targets.
US president Barack Obama says at the Copenhagen meet, “It is in our mutual interest to achieve a global climate accord. There is no time to waste, we should act, not talk.”