manila three russian warships include two anti-submarine vessels dock manila friday unload navy officials say weaponry military vehicles donate philippines part new defense relationship third port visit year russian warships part philippine president rodrigo duterte move engage closely moscow arch-rival manila former colonial master close defense ally unite state load include 5,000 assault rifle million round ammunition 20 army truck russian filipino navy officials say would best make port call significant contribution indicate friendly tie relations two nations interest security stability region say eduard mikhailov deputy commander russia pacific fleet flotilla visit time coincide arrival next week russian defence minister sergei shoigu attend regional defense meet u.s. counterpart jim mattis philippine navy spokesman say russia philippines expect sign security deal military logistics next week russian warships dock philippines manila cultivate new tie