Ukraine summons Polish envoy as diplomatic row between neighbours deepens

WARSAW (Reuters) - Ukraine has summoned the Polish ambassador in Kiev after Poland denied entry to a Ukrainian official in an escalation of a diplomatic spat over the two neighbours' troubled past.

Poland's decision to refused entry on Saturday to the head of Ukraine's commemoration commission, Svyatoslav Sheremet, was in response to a ban imposed earlier this year by Kiev on the exhumation of Poles killed in Ukraine during World War Two, Polish state news agency PAP reported.