People have created a large protests on the streets on the Philippine capital, Manila, where leaders are attending the Apec regional trade summit.
The movement includes hundreds of people from indigenous, student and labour groups which engaged in clash with police, who deployed water cannons against the people.
The summit has been overshadowed by regional territorial disputes, though they are not on the agenda.
Leaders have also urged for greater global anti-terror co-operation following the Paris attacks.
A draft copy of a declaration due to be released later today says leaders at the Asia Pacific Economic Cooperation (Apec) summit “strongly condemn” all acts of terror and stress the “urgent need for increased international co-operation and solidarity in the fight against terrorism”.