In a statement, the ministry says he is prevented from leaving the UAE as it too, is investigating him.
The FCID and Interpol are inquiring into the charges against Weeratunga.
The Sri Lankan embassy in Abu Dhabi is obtaining the services of UAE lawyers with expertise in immigration matters.
A team of Sri Lankan officials from the FCID, Attorney General’s Department and the Foreign Ministry are at talks with UAE authorities.
Says no red warrant against him
The ex-ambassador was arrested at Dubai airport as he was in transit to the US on the basis of a blue warrant issued against him over his connection to the fraud in the Air Force MiG deal during the previous regime.
He said in a posting on his Facebook page that he was released by Interpol as there was no red warrant against him.
Weeratunga also said he had no intention of returning to Sri Lanka, but that he now had the change to file a compensation case against Sri Lanka police.