NEW: 9 people were killed Tuesday, an opposition group says NEW: 13 members of the army and law enforcement were buried Tuesday, Syria says CNN's Arwa Damon reports from inside Syria The U.N. human rights chief decries the Syrian regime's "ongoing onslaught" against civilians (CNN) -- Fear and horror paralyzed residents in the Syrian city of Homs Tuesday, with snipers preventing anyone from moving and heavy shelling blasting through the air, opposition activists said. "The snipers are even targeting those who intend to get bread from the bakeries," said one activist, who uses the pseudonym Abu Omar. "They are shelling randomly -- why, I don't know," said another activist, identified only as Omar for security reasons. There is no place here in this city that is a safe house or shelter or a basement. You have to be lucky to stay safe. At least six civilians were killed by shelling in the Baba Amr neighborhood of Homs, according to the Syrian Observatory for Human Rights, an opposition activist group. Another two people were killed in Daraa and one in Damascus, bringing Tuesday's death toll to nine, according to the opposition Local Coordination Committees of Syria. Syria, meanwhile, said on state-run news agency SANA that 13 "army and law enforcement martyrs" were buried Tuesday. The martyrs were killed in the line of duty by armed terrorists groups in Damascus Countryside, Homs and Idlib. While U.N. diplomats slammed the Syrian regime for the country's mounting bloodshed, residents wondered what lay ahead. Her report came a day after the U.N. high commissioner for human rights denounced the Syrian government's "ongoing onslaught" against its citizens. But Tuesday morning, like clockwork, government forces again shelled Homs at dawn, opposition activists said. Tuesday's shelling was among the heaviest in the past five days, according to the Syrian Observatory for Human Rights. More than 710 people have been killed over the past 10 days in Syria -- mostly in Homs, the Local Coordination Committees said. But Pillay said evidence shows President Bashar al-Assad's forces are carrying out a gruesome crackdown. A U.N. General Assembly draft resolution that would condemn Syrian human rights violations has been discussed by diplomats but not formally introduced. It was unclear when the draft would be presented and when diplomats would vote on it. But Syria's U.N. ambassador, Bashar Jaafari, said the "aggressive, illegitimate" criticism of his country is designed to undermine the government. Syria routinely blames the violence in the country on "armed terrorist groups." SANA carried a story Tuesday quoting Jaafari saying, "Syria has the right to protect its citizens, combat terrorism and armed violence and put an end for them." Residents of cities such as Homs, an opposition stronghold, say innocent civilians are under siege by government forces. "The humanitarian situation is very bad -- big shortage in medications, limited water supply," Abu Omar said from the Homs neighborhood of Khaldiya. All three field hospitals are full with wounded, most of them in bad medical conditions. The United Nations is ready to deploy humanitarian supplies to Syria as soon as it gets access, said Martin Nesirky, a spokesman for U.N. Secretary-General Ban Ki-moon. Pillay said at least 5,400 people have died since protests seeking al-Assad's ouster began nearly a year ago, but she has said it is difficult to update that figure due to the chaos on the ground. The LCC says the death toll has far exceeded 7,000. Damon said every person interviewed has a horror story to tell, but some are too petrified to speak publicly with their full names. "One man we met, he had four members of his family executed as government forces, he said, were raiding their village," she said. She said some members of the opposition believe the regime will fall someday, but it's uncertain how many more lives will be lost before that happens. CNN's Nick Paton Walsh, Hamdi Alkhshali, Nada Husseini, Mick Krever, Richard Roth and Holly Yan contributed to this report.