Fears of violence and fraud are hanging over Saturday’s vote, in which almost 2,500 candidates are vying for 249 seats in the Wolesi Jirga, or the lower house of Parliament.

Afghanistan’s own election watchdog has warned of a “disputatious” process.

The poll is a test of stability in Afghanistan ahead of US President Barack Obama’s strategy review in December, which will likely examine the pace and scale of US troop withdrawals.

President Hamid Karzai’s credibility with his allies is also on the line, after a fraud-marred presidential vote last year, with observers warning that a repeat of that drawn-out poll would strain relations and could play into the Taleban’s hands.

The hard-line group repeated a warning that it would unleash violence during the poll, in which there are 11.4 million eligible voters.

“We call on our Muslim nation to boycott this process and thus foil all foreign processes and drive away the invaders from your country by sticking to jihad and Islamic resistance,” the Taleban said in a statement.

In the eastern city of Jalalabad, several hundred protesters demanding more polling stations clashed with police.

“This is a government plot and they are doing this deliberately. They don’t want these people to succeed in the election. They are mistreating us and we want more polling stations,” demonstrator Gulab Shah told Reuters Television. In southern Uruzgan, troops shot a protester armed with an assault rifle who tried to enter a coalition military outpost.

The protest was the latest in a weeklong series of demonstrations about plans by an obscure US pastor to burn copies of the Qur’an. The plan was abandoned at the weekend. The protester’s condition was not known since other protesters dragged him away, said James Judge, a civilian spokesman for the NATO-led International Security Assistance Force (ISAF). Karzai’s government says it can provide security for all voters on Saturday, with the support of 150,000 foreign troops as backup. However, the government election watchdog said two voting workers were gunned down on Wednesday in northern Afghanistan.

The independent Free and Fair Election Foundation of Afghanistan (FEFA) criticized the Electoral Complaints Commission (ECC), a UN-backed election oversight panel, for taking too little decisive action against government voting misconduct.

Out of more than 580 registered complaints, 310 were reported being committed by government officials, FEFA said.

“We are not encouraged by the level of action by the ECC against the government officials,” FEFA Chairman Nader Naderi told reporters.

“They did take some measures ... but they needed to be much more aggressive in addressing this serious issue.”

The ECC will have to adjudicate potentially thousands of complaints, a large number of which could delay the results of the ballot. No results are expected before Oct. 8, with the final result not due before Oct. 30.

The ECC said it had received reports the indelible ink used to mark voters’ fingers could be in fact be washed off, to allow double-voting.

The government-appointed Independent Election Commission (IEC) assured the ECC the ink was in fact indelible, ECC spokesman Ahmad Zia Rafat said.

Abdullah Abdullah, runner-up to Karzai in last year’s presidential poll, told reporters that should the elections be rigged this time around, it would strengthen the insurgency and break Afghans’ trust in democracy.

“The trust will disappear, and then, what’s the option for the people? The people will be left between a corrupt government and a violent Taleban, with no way out,” he said.

The United Nations has told about a third of its international staff to either leave or remain outside Afghanistan until after the election, owing to Taleban threats to disrupt the voting, UN spokesman Kieran Dwyer said.

The decision affects about 300 people, but does not apply to the 170 employees brought in specifically to help with the election, he said.