By Cyrus Ombati
The four were rescued as Kenya said the raid by gunmen at the Dadaab refugee camp raises serious concerns of security there and the country at large.
Reports said the four were rescued in an operation on Sunday night.
"Our forces have rescued the four aid workers kidnapped from Kenya in an overnight rescue operation," Colonel Abdullahi Moalim told Reuters.
"They are healthy and unhurt," he said. The rescue took place in Alibule some 70 kilometers from Afmadow, which is under Kenyan troops.
The four were staff of the Norwegian Refugee Council (NRC. During the kidnapping on Friday one person was shot dead and another seriously wounded by the armed gunmen who raided Dadaab's Ifo II camp in northern Kenya.
The deceased was a driver of one of the vehicles that was carrying the aid workers working for the Norwegian Refugee Council.
Acting internal security minister Yusuf Haji said the attack raises serious concerns about the security of the camp given it holds refugees.
“The attack raises serious concerns about the security of the camps because it seems the attackers had been there as refugees,” he said in Nairobi.
He said the government is “seriously thinking” about the refugee camp inside Kenya.