NORWAY; Yet another woman in her 30s was attacked by a black man wielding a knife as she headed for her car in a parking garage in Oslos Sagene district.  Its the latest in a series of attacks against women in Oslo in recent months. Three attempted rapes were reported last weekend and police and volunteers had mounted extra patrols this past weekend in the hopes of averting new attacks, most of which have occurred when women were returning home late at night and in each case the attacker was black .  Mondays attack came as a woman was leaving early for work. Police said she was slashed several times by the mans knife, but she managed to kick him and get away.  Her assailant was described as a man of African descent, around 185 centimetres tall and wearing a white hooded sweatshirt under a black jacket.  That matches the description of suspects in the earlier reported rape attempts but police said it was too early to link the cases.  Police launched a search in the Sagene area early Monday, including the use of specially trained dogs. No arrests had been made by mid-day.