BRUSSELS: Belgium’s parliament on Wednesday approved a controversial prisoner-swap treaty with Iran in a first reading of a text that still has to be submitted to a full vote to be ratified.

The treaty has been slammed by an Iranian dissident group, the National Council of Resistance of Iran, as well as some US lawmakers and Amnesty International as paving the way for an Iranian diplomat jailed in Belgium on a terrorism conviction to be allowed to return home.

Belgian Justice Minister Vincent Van Quickenborne on Tuesday told MPs that unless the treaty was adopted, “the threat to our Belgian interests and certain Belgian citizens will increase”.

He said Iran was already “illegally” holding captive a Belgian aid worker, Olivier Vandecasteele, 41, on trumped-up “espionage” charges.

The full parliamentary vote on the treaty, which was signed in March, is expected to take place on Thursday.

Tehran also holds a Swedish-Iranian academic, Ahmadreza Djalali, who taught at a Brussels university under the same charges, and has sentenced him to death.

The NCRI and Amnesty says they are the latest foreigners seized by Iran as leverage against Western countries.

Tehran is furious that Belgium last year jailed one of its diplomats, Assadollah Assadi, 50, after he was found guilty of masterminding a thwarted bomb attack on an NCRI event outside Paris in 2018.