“Peace is possible; peace is the only way,” writes Burmese Cardinal Charles Bo, in an open letter following an attack on a Catholic Church in Myanmar on Sunday night.

The Archbishop of Yangon was writing in his capacity as co-president of Religions for Peace International, an interfaith group dedicated “to ensuring that all people enjoy peace, harmony, and prosperity.”

More than 300 people from at least 60 families had fled to the Sacred Heart Church in Loikaw due to ongoing fighting between government forces and local rebel groups opposed to the military coup that took place in February.