KHARTOUM, Oct. 19 (Xinhua) -- The two released female aid workers from the Irish aid group GOAL arrived Monday in Khartoum after being in captivity for about a hundred days in Darfur.

The two aid workers, 33-year-old Sharon Commins from Ireland and the Ugandan Hilda Kawuki who is 42-year-old, looked healthy as they stepped down from the plane. They flew from North Darfur State to Khartoum airport Monday morning.

The two are expected to stay for a whole day at a hospital in Khartoum to undergo routine medical checkups.

"The two hostages did not suffer any physical harm, but they have experienced sever fatigue and therefore we decided to take them to the hospital for routine tests," said the Sudanese State Minister for Humanitarian Affairs Abdul Bagi al-Jailani in a press conference in Khartoum following their arrival.

The minister reiterated Khartoum's condemnation of the abduction of the two aid workers, saying "this is a crime. We will not tolerate those who committed it, and they will be brought to fair trials so that such shameful acts, which negatively affect the humanitarian conditions in Darfur, would not be repeated."

He further reiterated Khartoum's commitment to protect the humanitarian work and humanitarian workers in Darfur, explaining that the Sudanese government is working on a plan to protect aid workers in Darfur.

Al-Jailani described the abduction incidents against several humanitarian organizations' employees in Darfur as "individual acts," saying "what happened was a kind of criminal act of gangsters as the war in Darfur has ended."

During a press conference, the Ugandan ambassador to Khartoum, Betty Akech Okullu renewed her country's appreciation of the Sudanese government's efforts to ensure safety of the two hostages and their release without payment of any ransom.

She also sent a message to abductors in Darfur, saying "please stop such acts. I remind you that these humanitarian workers came to help your people in Darfur. They do not deserve this treatment which could force the humanitarian workers to stop working."

She further stressed her country's readiness to continue its support for the Sudanese government to reach a peaceful settlement for the crisis in Darfur, saying "my country is part of the joint UN-AU peacekeeping mission in Darfur and it is ready to continue supporting Sudan and the Sudanese people."

The Irish ambassador to Khartoum, Gerard Corr, for his part, reiterated his country's welcome to the release of the two hostages, saying "we have come out of this ordeal with many useful lessons."

He noted that the ordeal has created a close relation between his country and Sudan and that they have gotten acquainted with the crisis in Darfur, adding that the issue of the hostages was a long dilemma that had ended, and that they were happy with it.

The Irish aid group GOAL has been operating in Sudan since 1984.Its programs focus on provision of water, health and education services. The organization currently operates in North Darfur State. Around 1,100 employees work for the organization, 50 of them are foreign staff.

The Irish aid worker, Sharon Commins, joined GOAL team in North Darfur State about a year and half ago, while the Ugandan Hilda Kawuki, has been working at the organization's office in north Darfur for two years.

The two aid workers were abducted when unidentified armed men raided the quarters of the Irish GOAL organization in Kutum, North Darfur State, on July 3. They were released on Sunday. The period of their abduction was the longest that any foreign hostage has had in captivity since the war broke out in Darfur in 2003.

The Sudanese government adopted the principle of negotiation with the abductors in consideration of the two hostages' personal safety, where the Sudanese authorities utilized the influence of the leaders of the local administration to persuade the abductors to free the two female hostages without payment of any ransom.

GOAL earlier issued a press release in which it's Executive Director, John O'Shea said the released Irish aid worker Sharon was "healthy."

"Sharon and Hilda have suffered a traumatic ordeal but they have had the strength and courage to come through it," the press release said.

Ameerah Haq, the UN Coordinator for Humanitarian Affairs in Sudan, for her part was earlier reported to have welcomed, in a statement, the release of the two aid workers, and said that what happened was a reminder of the dangers faced by humanitarians working to help the people of Sudan, often in circumstances of considerable personal risk.