Myanmar's government has called for calm after mobs burned down a Muslim orphanage, a mosque and shops during a new eruption of religious violence in the northeastern Shan state. Authorities imposed a curfew late on Tuesday in Lashio, about 700km northeast of Yangon, after a mob of 200 local residents surrounded the city police station demanding they hand over a Muslim detainee. Al Jazeera's Wayne Hay reports from Yangon.