A hostage crisis at a high-security jail in Indonesia has ended on Thursday after Islamist militant prisoners who killed five police surrendered and released an officer they were holding. The five members of an elite counterterrorism force had been “sadistically” killed by prisoners during the stand-off at the jail on the outskirts of the capital Jakarta, police said. In a message carried on its Amaq news agency, Islamic State claimed responsibility and said 10 counterterrorism officers had been killed. Police denied that the Islamic State was involved and said a dispute had broken out over checks of prisoners’ food by prison authorities.