The crowd booed and hissed at Pastrana

But earlier, as he and government ministers arrived, they were booed by tens of thousands of people in the main square outside the church.

One mourner in the crowd accused the police of ignoring calls for protection for Archbishop Duarte.

"We will not forget that he was the one that put the archbishop against the wall," he said of Mr Pastrana.

Correspondents say feelings are running high over the archbishop's killing, with many people questioning the government's ability to guarantee public safety.

Outspoken critic

The shooting of Monsignor Duarte as he was leaving a church where he had celebrated a wedding has shocked a country wracked by civil war for the past four decades.

Monsignor Duarte had spoken out against rebels and drug barons

The 63-year-old Roman Catholic was an outspoken critic of drug barons, right-wing paramilitaries and left-wing rebels. Many believe he was killed for speaking out.

Local media reports suggest that official suspicions focus on drug traffickers - he had accused several candidates in this month's congressional elections of being financed by traffickers.

Colombia's two main rebel groups - the Revolutionary Armed Forces of Colombia (FARC) and the National Liberation Army - have denied any involvement in the shooting.

Both groups denounced the crime.

Since the weekend, thousands of people have filed past his glass-covered coffin in Cali's cathedral to pay their respects.

The Colombian authorities have arrested more than 300 people since Saturday, but only five are reported to be still in custody.