The Philippines says it has not banned Filipino seafarers from war zones but allows them to refuse risky deployments.
Former Philippine President Rodrigo Duterte will stand trial for crimes against humanity at the ICC.
Serbian authorities have arrested a man suspected of fighting for Ukraine.
Japan is participating for the first time in major joint military exercises between the Philippines and the United States in the South China Sea.
Philippine security forces killed 10 Islamic State-linked militants and captured a cache of weapons in Lanao Del Sur.