An opinion poll shows Greeks almost evenly split over Sunday's referendum on recent creditor proposals, with 41.5 percent saying they will vote "yes" and 40.2 percent "no," with 10.9 percent undecided. Prime Minister Alexis Tsipras called the referendum last weekend, asking Greeks to decide whether they should accept creditor reform proposals in return for bailout funds. The "yes" campaign says the referendum is a vote on Greece's future in the euro, which the government rejects. The poll, conducted by ALCO for To Ethnos newspaper, interviewed 1,000 people nationwide on June 30-July 1 and has a margin of error of 3.1 percent.