More than 100 houses have been set on fire in recent clashes . Attacks and counterattacks between Christians and Muslims began in May . After months of tense calm , they have flared up again this year . Authorities have tightened overnight security in several townships .
More than 1,000 houses have been set on fire in recent clashes . Attacks and counterattacks between Buddhists and Muslims began in May . After months of tense calm , they have flared up again this week . Authorities have extended overnight curfews in several townships .