REFILE-UPDATE 1-BP and Det norske agree $1.3 bln Norwegian oil merger
(Refiles to remove duplicated word in lead and typographical error in third paragraph) OSLO/LONDON, June 10 (Reuters) - Oil companies BP and Det norske have agreed to merge their Norwegian businesses in a $1.3 billion share deal to cut costs, increase profitability and challenge Statoil's N
