Around 30 people who invested in properties in Dubai that were never built staged a protest outside the United Arab Emirates National Day celebrations in Dublin.
The protestors are part of the Dubai Action Group, which represents 200 Irish people who invested a total of €20m in the development.
The investors bought their properties in the Dubai Sports City development seven years ago through Irish property investment company, Larionovo, which has since gone into liquidation.
The group said it believed it had bought the properties from the UAE government and are now looking for it to either complete the development, or refund the investments.
The DAG said the Dubai Land Department has accounted for the money but cannot tell it when the apartments will be built, or if the investors will be refunded.
The group protested at the UAE National Day celebrations to highlight their difficulties, in an effort to seek answers from the UAE ambassador in Ireland.
They are also demanding a meeting with His Highness Sheikh Maktoum bin Rashid Al Maktoum, the ruler of the UAE, to discuss the situation.
The Department of Foreign Affairs has confirmed that it is aware of the situation and has been providing assistance to the members of the Dubai Action Group in its dealings in Dubai.
A spokesperson for the department said it was anxious that the situation would be resolved for the group.