Latin Patriarch Pierbattista Pizzaballa told reporters at St. Joseph Hospital in Jerusalem that Friday's incident, broadcast around the world, was a ``disproportionate use of force'' against a large crowd of people waving Palestinian flags as they proceeded from the hospital to a nearby Catholic church in Jerusalem's Old City.
The attack drew worldwide condemnation and added to the shock and outrage over the death of Abu Akleh, who was killed as she covered a shootout in the occupied West Bank.
The police attack, Pizzaballa told reporters, ``is a severe violation of international norms and regulations, including the fundamental human right of freedom of religion, which must be observed also in a public space.`` Leaders and clergy of other Christian churches sat nearby.
There was no immediate Israeli response.
Israel and the Palestinians are locked in a war of narratives over Abu Akleh's killing.
The reporter, a Palestinian-American, a Catholic and a 25-year veteran of the satellite channel, was shot Wednesday while covering an Israeli military raid in the Jenin refugee camp.
She was wearing a blue vest clearly marked ``Press.'' Abu Akleh was a household name across the Arab world, known for documenting the hardship of Palestinian life under Israeli rule.
Palestinian officials and witnesses, including journalists who were with her, say she was killed by army fire.
The military, after initially saying Palestinian gunmen might have been responsible, later backtracked and now says it's not clear who fired the deadly bullet.
The United States and United Nations are among the many critics of the police crackdown at the funeral.
Israeli police say they agreed on funeral arrangements ahead of time with Abu Akleh's family, and that a crowd of mourners violated that agreement by marching with the coffin, instead of driving with it, and shouting nationalistic slogans.
But Abu Akleh's brother, Anton, disputed those claims. He said Monday that the family had given the funeral arrangements to Israeli police.
He said police did not want slogans or Palestinian flags. But he said ``this is something we cannot control.''
Anton said police also wanted to know the funeral route, and there was no other agreement. ``We wanted to put the coffin in the car,'' he said. ``We were going to the car when they attacked us.''
Israeli police launched an investigation into the conduct of the officers who attacked the mourners, causing the pallbearers to nearly drop the casket.
Israel's public broadcaster Kan published what it said was security camera video showing police bursting into the hospital before the funeral.
Meanwhile, Israel and the Palestinians have continued to argue over the investigatiton into the shooting.
Israel has sought the bullet, saying it must be analyzed by ballistics experts to reach firm conclusions.
Palestinian officials have refused, saying they don't trust Israel. Human rights groups says Israel has a poor record of investigating wrongdoing by its security forces.
After earlier saying they would accept an outside partner, the Palestinians said late Sunday that they would handle the investigation alone and deliver results very soon.
``We also refused to have an international investigation because we trust our capabilities as a security institution,'' Prime Minister Mohammed Shtayyeh announced. ``We will not hand over any of the evidence to anyone because we know that these people are able to falsify the facts.''
Amid the wrangling, several research and human rights groups have launched their own investigations.
Bellingcat, a Dutch-based international consortium of researchers, published an analysis of video and audio evidence gathered on social media.
The material came from both Palestinian and Israeli military sources, and the analysis looked at such factors as time stamps, the locations of the videos, shadows and a forensic audio analysis of gunshots.
The group found that while gunmen and Israeli soldiers were both in the area, the evidence supported witness accounts that Israeli fire killed Abu Akleh.
``Based on what we were able to review, the IDF (Israeli soldiers) were in the closest position and had the clearest line of sight to Abu Akleh,'' said Giancarlo Fiorella, the lead researcher of the analysis.
Fiorella acknowledged that the analysis cannot be 100% certain without such evidence as the bullet, weapons used by the army and GPS locations of Israeli forces.
But he said the emergence of additional evidence typically bolsters preliminary conclusions and almost never overturns them.