Baghdad, Iraq ? Residents of one of Baghdad’s most insurgent-hit neighborhoods received copies of Iraq’s draft constitution Thursday, though some refused to take it and some shopkeepers balked at passing it out, fearing reprisals by militants determined to wreck the crucial Oct. 15 referendum.

Insurgents continued their wave of violence with attacks in and around the capital, including the suicide bombing of a minibus, that killed at least 20 Iraqis and an American soldier.

Despite the bloodshed, Iraqis in the southern Baghdad neighborhood of Dora had their first look at the document they will vote on in nine days, though distribution of the U.N.-printed blue booklets – emblazoned “The constitution is in your hands” – got off to a slow start elsewhere.

“If we like it, we will vote ‘yes.’ If we don’t, we’ll say ‘no,”‘ said Lamia Dhyab, a Shiite woman in a head-to-toe veil.

She and other Dora residents got copies Thursday morning along with their monthly government-subsidized rations of rice, soap, cooking oil and other staples. The constitution is being distributed through the rationing system because some 80 percent of Iraqis have been enrolled in it since the days of U.N. sanctions against Saddam Hussein.

Hamza al-Baidhani, 60, said the rations distributor he went to refused to pass out the booklets, claiming gunmen threatened to burn his business. “I wish that the Iraqi forces will be responsible for distributing the copies,” he said.

About two dozen boxes of the booklets were found thrown in a Dora garbage dump – apparently a sign of opposition or of shopkeepers’ fears of having the document around.

Al-Qaida in Iraq has called for increased attacks during the Islamic holy month of Ramadan, which began this week, and more than 290 people have been killed in attacks the past 11 days, many of them Shiites.

In Thursday’s deadliest assault, a suicide bomber boarded a minibus packed with 14 passengers – officers going to the police academy and students and workers headed home to the Shiite district of Sadr City.

The bomber, seated by the driver, set off his explosives belt as the bus passed a police patrol. At least nine people were killed and nine wounded, said Police Capt. Abbas Ali. The bus was left a burned-out husk.

The U.S. military warned of more violence but said it was making progress in improving security ahead of the referendum and that two major offensives in the Sunni heartland of western Iraq would help provide a safe atmosphere for the vote.

Some 5 million copies arrived in Iraq on Monday, but distribution does not appear to have started in the north and south, where the constitution is expected to pass by a wide margin.

Dora was one of the first Baghdad districts to get its copies – and the document faced a tough audience.

The rural suburb of farms and fields is largely Sunni and insurgents are intensely active. Nearly every day sees a shooting, drive-by killing or gunbattle, including one Thursday evening.

“Most of our customers refused to take their copies,” said shopkeeper Khalid al-Jabouri, 37. “Some families told me they heard the gunmen were watching them, so they are afraid they will see them getting copies and come to take revenge.”