MANILA - Russia will buy $2.5 billion worth of fruits and fish from the Philippines over the next 12 months under an agreement that will be signed during President Rodrigo Duterte's visit to Moscow this week, his agriculture minister said Tuesday.

In exchange, the Philippines will "open its doors" to farm machinery and meat from Russia, Secretary Emmanuel Piñol said in a statement on his Facebook page.

Piñol said he would sign the agricultural trade agreement with his Russian counterpart, Alexandr Tchakyov.

Duterte arrived in Russia on Tuesday to kick off a 4-day visit aimed at strengthening his foreign policy shift away from the US.