BEIJING (AFP) - A villager in rural east China unhappy over social injustice detonated an explosive in a local government building Monday, killing himself and wounding six others, state press said. Qu Huaqiang, a “disgruntled petitioner,” allegedly set off homemade explosives at the government offices in Tengjia township, Shandong province on Monday morning, Xinhua news agency said. It was not clear if the injured were government officials. No other details were immediately available. News of the bombing circulated widely on the Internet with numerous microbloggers expressing sympathy with the suspect bomber, while criticising as a sham China’s petition system, an age old institution aimed at addressing injustice.