The former British ambassador to Myanmar and her husband has been sentenced to one year in prison by the country’s military authorities.

Vicky Bowman and her husband, former political prisoner Htin Lin, have been sentenced to one year in prison by a military court in Myanmar for violating immigration laws. The couple were arrested at their home in Yangon. Vicky Bowman served as Ambassador to Myanmar from 2002 to 2006.

Htin Lin is an artist and former political prisoner who was a member of the All Burma Students’ Democratic Front, an armed resistance group that was formed in 1988 after a popular student-led uprising against the military junta.

The arrest of the ambassador couple comes after Britain recently announced sanctions against Myanmar military officials, citing deadly attacks on Rohingya Muslims in Myanmar.