NEW : A shootout frees the Four aid workers , the Norwegian military says . The aid workers are with the global humanitarian agency 's . The abductors get away with a refugee council vehicle . Nairobi , Kenya ( CNN ) -- Four aid workers , who were abducted from Kenya 's vast Dadaab refugee complex near the Somali border last week , were freed late Sunday during a shootout with kidnappers , a military official said.. Nairobi has blamed previous abductions on the militant Elizabeth Joseph group .
NEW : A shootout frees the Four aid workers , the Norwegian military says . The aid workers are with the global humanitarian agency 's . The abductors get away with a refugee council vehicle . Nairobi has blamed previous abductions on the militant Elizabeth Joseph group .