Qatar has denied any wrongdoing and Morocco has accused the media of making unjustified “attacks”.

The allegations have roiled the parliament and sparked unease in other EU institutions, with concerns voiced that their public credibility could be shaken.

Panzeri is one of four suspects held in Belgium following police raids on addresses last month that turned up €1.5 million in cash.

EU vows big reforms amid corruption scandal

The searches were conducted in the homes and offices of MEPs, former MEPs, parliamentary aides, and the heads of NGOs that dealt with the parliament.

All four are being held on charges of “criminal organisation, corruption and money laundering”.

Panzeri, 67, headed another NGO suspected of receiving money from certain countries to pay serving MEPs to sway parliamentary decisions on issues important to those countries.

Belgian media said Panzeri was put under surveillance by Belgian intelligence services for at least a month before his arrest.

The reports said he received money from Morocco to promote its interests in the parliament.

Italy has arrested Panzeri’s wife and daughter under a warrant issued by Belgium and authorised their extraditions.

But his wife is challenging the court order, and his daughter is expected to follow suit, according to Italian media.

Panzeri did not appear at a scheduled custody appeal Tuesday, withdrawing for what prosecutors initially said were “personal reasons”.

In their statement on Panzeri agreeing to turn over evidence, prosecutors said they were applying a “pentiti” law, designed for mafia cases in which a criminal suspect repents.

It was only the second time in Belgian legal history that the “pentiti” statute has been used. The first time was in 2018, for a football agent who cooperated on international corruption in the sport.

Panzeri’s lawyer said the deal meant Panzeri could receive a sentence of up to five years, but with only a maximum of one year spent in custody, part of which could be under house arrest with an electronic bracelet.

Prosecutors said Panzeri committed to truthfully tell all about “the identity of the persons he admits to having bribed”.

He is also to divulge his methods, the “financial arrangements with other involved countries” and “the involvement of known and unknown persons within the investigation”.

That last pledge could send chills down the spines of potential suspects who have not been questioned by Belgian authorities.

Already intense scrutiny is being directed at any EU official or lawmaker who has made effusive statements in favour of Qatar or Morocco.

Qatar has highlighted some of those statements which have been made defending it from accusations of worker rights abuses in the lead-up to last year’s World Cup, which it hosted, and its bid to get visa-free travel to the EU.

Morocco is keen to win sympathetic positions from Europe to its claim over the disputed Western Sahara, where an Algiers-backed Polisario movement seeks independence.

The European Parliament continues to be rocked by the scandal.

Belgian prosecutors have requested it lift the immunity of two other MEPs, Belgian Marc Tarabella and Italian Andrea Cozzolino, to further their investigations.

The legislature has launched that procedure, likely to be completed next month.

Kaili was not able to assert immunity because a Belgian judge deemed she was caught red-handed.

European Parliament chief Roberta Metsola announced Monday proposals to clean up the legislature and protect it from “corruption” and “foreign interference”.

They include restricting MEPs’ activities with non-EU countries and having a public register of MEPs’ finances.

Additional reporting by Associated Press