Updated

The owner of a Chinese fishing boat seized for more than two weeks by armed North Koreans says the captors wore military uniforms, and that they beat up the boat's captain and stole its fuel.

Owner Yu Xuejun says the captors eventually released the boat Tuesday without the ransom they had demanded.

The incident was the latest irritant in relations between North Korea and a Chinese government increasingly frustrated with its neighboring ally over tests of its nuclear and rocket technologies in defiance of U.N. bans.

After word of the boat's capture became public over the weekend, China had demanded that North Korea release the men, though Chinese officials have not said whether they believe the armed captors were operating on their own or under North Korean government authority.