ACCRA (Reuters) - West Africa's main political and economic bloc imposed sanctions on Sunday against Mali's transitional leaders after they informed the organisation they would not be able to hold elections in February as previously agreed.

       The sanctions include a travel ban and asset freeze on all members of the transitional authority as well as certain family members, the Economic Community of West African States (ECOWAS) said in a statement following a summit in Ghana.

       (Reporting by Christian Akorlie; Writing by Aaron Ross; Editing by Edmund Blair)