KYIV, April 17 (Reuters) - Kyiv will aim to secure the re-opening of food and grain transit via Poland as "a first step" at talks in Warsaw on Monday, Ukraine's agriculture minister said, after Poland and Hungary announced bans on some imports from Ukraine. Poland's ban on grains, in effect since Saturday evening, also applied to transit through the country. Officials have said it is meant to keep grain transport from entering the Polish market. Deliveries to Hungary accounted for around 6% of Ukraine's farm exports, he said, adding that Ukrainian food transit via Hungary and Slovakia was unaffected. Talks between Ukraine and Poland were due to start in Warsaw around 12:00 p.m. (1000 GMT), Polish Agriculture Minister Robert Telus said on TVP Info.

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