Antisense oligomers useful for modulating hepatitis B virus infections, and for the treatment of hepatitis B virus (HBV) and hepatitis B virus-related conditions in animals including humans. More particularly, antisense oligomers with modified nucleotides for treatment of HBV in animals, more particularly antisense oligomers comprising 2O-4C-methylene-bridged sugars, or nucleotides with other 2O-4C bridged sugars, also known as locked nucleic acids (LNA), for treatment of HBV in animals, and more particularly for treatment of HBV in humans.