SINGAPORE (AFP) - Election watchdogs on Sunday ordered a recount of votes cast in Singapore's presidential polls after the two leading candidates ended up with a razor-thin difference. A political maverick, medical doctor Tan Cheng Bock, was running neck and neck against former deputy prime minister Tony Tan after Saturday's four-way contest for head of state. The country's chief election watchdog, the Returning Officer, "has allowed the recounting of all votes cast" after the first tally showed they were less than two percent apart, an official statement said.