The family of Euna Lee, one of the two detained American journalists in North Korea, says they are concerned about the two women's health conditions.

In a telephone conversation on Tuesday, Lee had told her family that she lost seven kilograms.

During a rally for the release of the detained journalists in San Francisco, Lee's sister Jina Lee expressed the family's concerns while saying the two journalists have reportedly admitted to illegally entering the communist country.

The family members of the other detained journalist, Laura Ling, said in a media interview that they talked on the phone with Ling who acknowledged that said she and her co-worker had broken the law in North Korea.

The two reporters of San Francisco-based Current TV were arrested near the North’s border with China in March for entering the country illegally and unspecified "hostile acts.” They were sentenced to 12 years in the North’s labor camp.