The situation in Manipur remains tense as a mob set Union Minister Rajkumar Ranjan Singh’s house on fire in Imphal on Thursday late night. A mob stormed the Union Minister of State for External Affairs’ residence at Kongba in Imphal. Manipur has been witnessing clashes between two groups over the demand for inclusion in the Scheduled Tribes (ST) category. Union Minister RK Ranjan Singh was not at the house at the time of the incident, officials said.