Shelling in Syria as Red Cross appeals for access BEIRUT (AP) - Syrian forces renewed their bombardment Saturday of rebellious areas of Homs, activists said, as the Red Cross vowed to try again to reach thousands of people stranded in a district overrun by regime troops after a monthlong siege. Conditions in the western neighborhood of Baba Amr have been described as catastrophic, with extended power outages, shortages of food and water, and no medical care for the sick and wounded. Syrian government forces took control of the neighborhood Thursday after rebels fled the district under constant bombardment that activists said killed hundreds of people since early February. The Syrian regime has said it was fighting "armed gangs" in Baba Amr, and has vowed to "cleanse" the neighborhood. The Red Cross said it had received permission from President Bashar Assad's government to enter Baba Amr. A convoy of seven trucks with 15 tons of humanitarian aid including food, medical supplies and blankets left Damascus on Friday, taking several hours in heavy snowfall to reach Homs. But once they neared Baba Amr, the government prevented them from entering. "We are still in negotiations to enter Baba Amr," ICRC spokesman Hicham Hassan said Saturday in Geneva. The Syrians said they were not letting the Red Cross into Baba Amr because of safety concerns, including land mines, Hassan said, adding the organization had not been able to verify the danger. The government has not offered its explanation for revoking the permission. "It's important that we get in today," Hassan said. We are not about to give up. Other areas in Homs, Syria's third-largest city with about 1 million people, came under heavy shelling Saturday. The Local Coordination Committees activist network said mortars slammed into the districts of Khaldiyeh, Bab Sbaa and Khader. Abu Hassan al-Homsi, a doctor at a makeshift clinic in Khaldiyeh district of Homs, said he treated a dozen people who were wounded, most lightly. In other violence Saturday, a suicide car bomb exploded in Daraa, killing at least two people and wounding 20, activists said. The state-run news agency said the blast occurred at a roundabout in an area known as Daraa al-Balad and said there were casualties including civilians and security forces. The revolt has killed more than 7,500 people, according to the most recent U.N. estimate. Syria has seen a string of suicide bombings, the last on Feb. 10, when twin blasts struck security compounds in the government stronghold city of Aleppo, killing 28 people and bringing significant violence for the first time to the city. The capital Damascus, another Assad stronghold, has seen three suicide bombings in the past two months. Associated Press writers Frank Jordans in Geneva and Elizabeth A. Kennedy in Beirut contributed to this report.