Narendra Modi. Pic/AFP

Unidentified persons hacked to death the father of a BJP worker allegedly over a tiff over naming of a square on the outskirts of the city after Prime Minister Narendra Modi. Police, however, claimed that murder of 65-year-old Ramchandra Yadav late on Thursday night, whose BJP activist son Kamlesh Yadav sustained injuries in the attack, was the fallout of a "personal enmity".