The legal fraternity here Thursday observed boycott of courts against the killing of an Additional Session Judge in Quetta. The courts adjourned mostly cases as the lawyers remained off the courts. However, they appeared in urgent cases only. PBC vice chairman Malik Ghulam Abbas Nissoana had given call to the bars of the province to go on strike to record their protest against the target killing of the judge. The bar demanded the government to arrest the killers of the judge.