Haiti requested the aid in a letter dated August 3 addressed to UN Secretary-General Antonio Guterres, the embassy in the neighboring country said in a statement. Specifically, Haiti called for an "international commission of inquiry" to be formed, along with a special court to prosecute the suspects.
The letter, signed by foreign minister Claude Joseph, said that Haiti considered the attack on Moise in his residence an international crime due to the alleged role of foreigners in planning, financing and carrying it out.
Haitian authorities have detained former Colombian soldiers allegedly hired by a Miami-based security firm on suspicion of carrying out the assassination of Moise.
Haiti also said the UN support should follow the model of its inquiry into a 2005 terrorist attack in Lebanon, which killed 22 people, including the prime minister.