Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Gunfire Heard in Khartoum Despite New Cease-Fire Declarations by Mariama Diallo Khartoum, Sudan -- Sounds of gunfire rang out across Sudan's capital Friday, despite renewed cease-fire declarations from Sudan's military and a rival paramilitary force locked in heavy clashes for the past seven days. Neither side had immediate comment on an offer from Kenyan President William Ruto to mediate the conflict, which has killed hundreds and prompted thousands of Khartoum residents to flee the city. The Sudanese army and the paramilitary Rapid Support Forces, or RSF, each announced they would honor a 72-hour cease-fire beginning Friday to mark the end of the Muslim holy month of Ramadan. "The truce coincides with the blessed Eid al-Fitr ... to open humanitarian corridors to evacuate citizens and give them the opportunity to greet their families," the RSF said in a statement. Gunfire was heard throughout the day in Khartoum, however, raising questions about whether the declared truce would fail like several others this week. In a televised message to the nation, Army chief General Abdel Fattah Burhan said he remains hopeful the military will win the battle, and he vowed to secure what he called Sudan's "safe transition to civilian rule." For many Sudanese, Burhan's claim likely rang hollow, as 18 months ago he joined forces with RSF leader Mohammed Hamdan Dagalo to seize power in a coup that ousted a pro-democracy transitional government. In Kenya, Ruto made his offer to mediate the conflict as he conveyed a message of goodwill to the Sudanese as Ramadan comes to an end. Murithi Mutiga, Africa program director of the International Crisis Group, said it's encouraging that neighbors, including Kenya, are eager to help resolve the Sudan crisis, but he's skeptical that Ruto or any one leader can do it alone. "The reality, though, is that you need concerted actions by multiple external partners because nobody has really substantial leverage over the main actors," he said. Ruto said he strongly believes that a peacefully negotiated solution to the conflict in Sudan is within reach. He expressed hope the fighting parties will respond to appeals to end the fighting put forth this week by the East African regional bloc IGAD and the African Union. But Mutiga said major powers need to step in. "It's good to support the regional initiatives that might send the Kenyans, the Djiboutians, and South Sudanese heads of state, but they need to be backed up by serious external pressure, particularly by two key players: Saudi Arabia and the U.S.," he said. "They have considerable access to the main actors. They might be able to move the needle and they might be able to encourage them to accept talks." Ruto said halting the fight will be a gesture of goodwill and will stop a descent into conflict, insecurity, instability and humanitarian crisis. Mutiga said the RSF's announcement of a cease-fire that was seemingly met with no interest from the Sudanese army suggests the RSF might be under some sort of military pressure. "But we have to remember that this is a very large force, very motivated force and one with a lot at stake," Mutiga said. "The armed forces seem determined to crush them militarily, but that is partly because they worry that a truce might allow the RSF to reinforce." Regardless, Mutiga said it is essential that the two parties move toward an agreement sooner rather than later because the suffering in Sudan has been horrific. At least 330 people have been killed in the power struggle between the two previously allied leaders of the ruling military junta, Burhan and Dagalo. Mariama Diallo reported from Nairobi, Kenya. The Associated Press and Reuters contributed to this report.