Exit polls in Ukraine's presidential run-off election indicate that pro-Russian opposition leader Viktor Yanukovych has narrowly won the election against Prime Minister Yulia Tymoshenko.
The National Exit Poll predicts Mr. Yanukovych has received 48.7 percent of Sunday's vote while Ms. Tymoshenko won 45.5 percent.
Reuters news agency reports a second exit poll giving Mr. Yanukovych 49.8 percent against 45.2 percent for Ms. Tymoshenko. Official results are expected later this week.
A close aide of Ms. Tymoshenko says it is too early to declare a winner.
Mr. Yanukovych, who was considered the front-runner in the election, was declared the winner of the Ukraine's last presidential election in 2004. But charges of massive fraud and huge street protests dubbed the "Orange Revolution" led to a new election, which he lost to pro-Western candidate Viktor Yushchenko -- the current president.
Ms. Tymoshenko became prime minister in the Orange Revolution.