Washington, Aug 12 (DPA) US President Barack Obama called on Myanmar's ruling junta to immediately release human rights activist Aung San Suu Kyi, who received an additional 18 months of detainment Tuesday for allegedly violating the terms of her house arrest.

Obama issued a statement saying the conviction and sentencing 'unjust' and a violation of human rights. The trial that handed Suu Kyi, 64, another 18 months of house arrest and effectively sidelined her for the upcoming elections has drawn worldwide condemnation.

'I join the international community in calling for Aung San Suu Kyi's immediate unconditional release,' Obama said.

US State Department spokesman P.J. Crowley said he was premature to conclude whether the US will pursue additional sanctions on the UN Security Council. Myanmar's rulers have already been sanctioned by the US, United Nations and the European Union.

'We'll be comparing notes about the implications of this case and what the consequences will be,' Crowley said.