When his colleagues found him, his pockets had been emptied and his Secours Catholique-Caritas France t-shirt removed.
Villagers reported seeing Mr Sukaka, who was a Congolese national, stopped by two men wearing Congolese army uniforms before he was killed.
"Unidentified gunmen opened fire on their car as soon as they left for a trip to conduct surveys," Dahir Mohamed, one of their colleagues, said by phone from the region."We don't know who is behind the attack and the gunmen escaped after they killed the men," local elder Hasan Haji Idris said.
Source: Two Somali aid workers and their driver shot dead
For other aid worker deaths this year see the Aid Worker Fatalities 2009 map.
Zivny's medical insurance had expired before the attack. News of his death came as Picklyk and others were trying to raise funds to bring him back to Canada for treatment.
Three masked gunmen shot and killed 44-year-old Somali national Ibrahim Hussein Duale, while he was monitoring school feeding in a WFP-supported school in Yubsan village six kilometres from the Gedo region capital of Garbahare. Witnesses say the gunmen approached him while he was seated, ordered him to stand up and then shot him.
Some 300,000 Sudanese refugees who have fled the Darfur conflict live in camps in Eastern Chad. 187,000 Chadians displaced by fighting in Chad have also sought sanctuary in IDP camps in the area.
Rebels attack eastern Chadian town, aid worker says
Officials: Rebels attack in eastern Chad
For further information: Bill Curry, spokesman for the Mizell family, +1-206-697-3684 Web Site: http://www.onlinefilefolder.com
SEATTLE, Feb. 3 /CNW/ -- The family of Cyd Mizell, an American aid worker currently being held in Afghanistan, today released the following statementfrom her father, George Mizell: "I am Cydney's father. My family and I want to thank all those who have shown their deep concern for the safety and well being of my daughter, Cydney Mizell, and Muhammad Hadi. I am indebted to the Afghan people for their support of Cydney and Muhammad. "My family and I love Cyd very much. I'm confused why my daughter would be taken because she's a gentle, caring and respectful person. "When we talk to Cyd, she tells us about the friends she's made and the kindness that's been shown to her and her desire to help them. "To those people who are holding our daughter, please let Cyd come home. Each day that passes without knowing about Cyd is difficult for our family andfriends. "We ask that you work with us so Cyd can come home. Cyd knows how to contact us and her co-workers. All of us are waiting to hear from you."