Nigerian gunmen free 4 foreign oil workers -army

PORT HARCOURT, Nigeria, June 26 (Reuters) - Nigerian gunmen have freed four foreign oil workers kidnapped in two separate incidents in the Niger Delta last month, a military spokesman said on Thursday.

Sagir Musa, spokesman for the military taskforce in Rivers state, said one Portuguese and one Ukrainian national among 11 crew members taken on May 13 from an oil supply vessel contracted to U.S. oil firm Chevron (CVX.N), were released early on Wednesday.

He said a Pakistani and a Maltese working for oil services company Lonestar, who were kidnapped in the Niger Delta in a separate incident on May 23, had also been released. (Reporting by Austin Ekeinde; Editing by Tume Ahemba)