The protesters said it was "improper and untimely" for the military junta to pursue the constitutional referendum while Myanmar's people are suffering from the devastation of Cyclone Nargis.
"While the people are so worried about survival in the midst of this disaster, the junta is too preoccupied thinking on how to pursue its referendum," said Egoy Bans, spokesman for the Free Burma Coalition in the Philippines.
"We hope the regime would now set aside self-interest for the sake of their own suffering people," he added. "The referendum can wait."
The coalition also urged the junta to allow the free movement of aid agencies amid reports of restrictions on the entry of aid agencies.
