KABUL, Oct. 20 (Xinhua) -- At least four people, including two policemen, were injured after four blasts, caused by improvised explosive devices (IEDs), occurred near polling stations in Kabul on Saturday, an Afghan official said.

The polling of the parliamentary elections in the militancy-plagued country continued smoothly, he added.

More than 2,500 candidates are contesting for the Wolesi Jirga or the 249-seat lower house of the parliament.

Taliban militants who have vowed to sabotage the voting are yet to confirm any attack on polling stations in the country, where more than 50,000 security forces have been deployed to provide security for the long-delayed polling.