Doha, Qatar (CNN) -- An international donors' conference on Darfur kicked off Sunday in Doha with the hope of raising $7.25 billion to bring aid and sustainable development to the troubled region in Sudan. 

"There is an opportunity to assist the people of Darfur through massive generosity," said Ali Al-Zatari, the representative of the United Nations Secretary-General Ban Ki-moon in Sudan. 

"Darfur still needs stability," Al-Zatari added. He said 3.5 million people need humanitarian assistance, and 1.5 million of them live in camps. 

The conference, whose participants include the UN, the governments of Qatar and Sudan, and the World Bank, seeks to "to mobilize financial support for the recovery and development needs in Darfur." 

Reactions to the conference, however, are mixed. 

"The conference is a strong message to the Darfurian people that they are not forgotten," said Abdullah Adam Khatir, a Darfurian writer. "It will take time, it's a process,." 

Al-Baqir Afifi, a civil society activist, on the other hand, disagreed with the conference's approach. 

"Those who are going to pledge money want to know if the money is going to reach Darfur or not," he said. "It is still insecure in Darfur; there is chaos," he added. 

Protests against the conference took place in some camps in Darfur last week. 

"What are they going to do with this money when there is no security?" an activist who preferred not to be named said, according to AFP. 

Violence broke out in Darfur in 2003 when non-Arab rebel groups took up arms against the central government in Khartoum, accusing it of neglect and discrimination. 
How many Dafurians need help?
3.5 million people need humanitarian assistance