NEW : A raid frees the four aid workers , the Kenyan government claims . The aid workers are with the Norwegian Refugee Council . The abductors get away with a refugee council vehicle . Kenya has blamed previous abductions on the militant al - Qaeda group .
NEW : A shootout frees the four aid workers , the Kenyan military says . The aid workers are with the Norwegian Refugee Council . The abductors get away with a refugee council vehicle . Kenya has blamed previous abductions on the militant Al-Shabaab group .