Provided are fused tricyclic compounds of the general formula I, wherein the variables are as defined in the specification. Examples of the compounds include (±)-exo-5-((1(1H-benzo[d]imidazol-2-yl)-1,1a,6,6a-tetrahydrocyclopropa[a]inden-3-yl)oxy)-3,4-dihydro-1,8-naphthyridin-2(1H)-one and (±)-exo-5-((1-(5-fluoro-6-methyl-1H-benzo[d]imidazol-2-yl)-1a,6b-dihydro-1H-cylopropa[b]benzofuran-5-yl)oxy)-3,4-dihydro-1,8-naphthyridin-2(1H)-one. The compounds are inhibitors of RAF kinase. The compounds may be useful in the treatment of cancer.