Is an American citizen now a political prisoner in Burma?

AP reports that

US Embassy spokesman Drake Weisert said officials were allowed to visit Kyaw Zaw Lwin on Sunday and have since contacted his family. He had a visa to visit the country, but it is unclear why he traveled to Yangon.

Dissident groups have said the Maryland-based Kyaw Zaw Lwin arrived in Yangon on Sept. 3 and has not been heard from since. It is not known why the junta detained him, but many of his family members have been held over the years for their pro-democracy activities.

Kyaw Zaw Lwin's mother is serving a five-year jail term while his sister was sentenced to 65 years in prison for her role in pro-democracy protests two years ago.

More about Burma's 2,000 political prisoner's here.