Josep Borrell, the EU's high representative for foreign affairs, described the arrests related to alleged corruption in the European Parliament as "very, very worrisome."
The allegations against four persons, according to Irish Foreign Affairs Minister Simon Coveney, are "extremely devastating."
Vice President of the European Parliament Eva Kaili,
who is thought to be one of those indicted, was detained.
Authorities believe a Gulf nation reportedly Qatar—tried to sway parliament through monetary or in-kind contributions.
Qatar has refuted any wrongdoing.
In 16 searches conducted in Brussels on Friday,
Belgian police confiscated cash totaling roughly €600,000 ($632,000; £515,000).
In order to investigate the contents, computers and mobile phones were also
taken.
According to prosecutors, two persons have been
freed while four have been charged.
Although no suspects have been officially
identified, Ms. Kaili is believed to be one of those who have been charged.
They are accused of participating in a criminal
organisation, money laundering, and corruption, according to a statement from
the Belgian federal prosecutor's office.
Ms. Kaili, an eight-year MEP, was relieved of her
responsibilities as one of the 14 vice presidents by Roberta Metsola, president
of the European Parliament.
She has also been kicked out of the Greek Pasok
center-left party and suspended from the Socialists and Democrats group in the
parliament.
All of Ms. Kaili's assets are allegedly blocked by
Greek prosecutors.
The bribery inquiry, according to watchdogs and
opposition MEPs, may be one of the largest corruption scandals in the history
of the European Parliament.
As he arrived for a meeting of EU foreign ministers
on Monday, Mr. Borrell told reporters, "The news is certainly very, very
troubling."
As a former president of the European Parliament, I
can say with certainty that the events and circumstances we are currently
confronting worry me.
Before the meeting on Monday, Mr. Coveney said that
"we need to get to the bottom of it" and called the accusations
"extremely harmful."
Terry Reintke, who serves as co-chair of the Green
group in parliament, has demanded that Ms. Kaili quit immediately.
The German MEP stated, "We shouldn't even have
to remove her from her vice president post." She needs to handle this
actively.
According to prosecutors, a Gulf state has been
meddling in the political and economic choices of the parliament for a number
of months, particularly by targeting aides.
Although the state has been identified by local
media as Qatar, the Qatari government has stated that any allegations of
wrongdoing are "gravely erroneous."
The Middle East is one of Ms. Kaili's
vice-presidential responsibilities. She has previously stood up for Qatar.
Ms. Metsola took a flight on Saturday night from her
native Malta to Brussels to observe the search of an MEP's home, as required by
Belgian law.
The European Parliament "stands firmly against
corruption," according to her spokeswoman, and is "completely
collaborating" with the authorities.
The only institution in the EU to be chosen directly
is the European Parliament. The 705 members of parliament chosen by citizens of
the 27 EU member states gather to review new laws and pass them into European
law.