Indonesia is a multiparty democracy. In 2009 Susilo Bambang Yudhoyono was reelected president in free and fair elections. Domestic and international observers judged the 2009 legislative elections free and fair as well. Security forces reported to civilian authorities. Major human rights problems included instances of arbitrary and unlawful killings by security forces and others in Papua and West Papua provinces, societal abuse against certain minority religious groups, and abridgement of the rights of particular religious minorities to freely practice their religion by regional and local governments. Official corruption, including within the judiciary, was a major problem, although the Anticorruption Commission (KPK) took some concrete steps to address this. Other human rights problems included: occasionally harsh prison conditions; some narrow and specific limitations on freedom of expression; trafficking in persons; child labor; and failure to enforce labor standards and worker rights. The government attempted to punish officials who committed abuses, but judicial sentencing often was not commensurate with the severity of offenses, as was true in other types of crimes as well. Separatist guerillas in Papua killed members of the security forces in several attacks and injured others. Nongovernment actors engaged in politically related violence, including murder, in Aceh Province.