Pope Francis admitted there is financial corruption in the Vatican, describing it as a "scandal" on Tuesday. The pope's statement marked the first time he has acknowledged corruption in Vatican finances.

"There is corruption, it's clear. With the interrogations we will see if they are guilty or not. It is an ugly thing, it's not nice for this to happen in the Vatican," Francis said during an in-flight press conference on the way back from Japan.

Read more: Opinion: A synod that could make history

The pope told reporters that there was a Vatican investigation underway into the allegedly fraudulent use of the Peter's Pence, the pope's charity fund, to buy a luxury property in central London. The pope has previously said that such a purchase is not necessarily a misuse of charity funds.

"What happened, happened: a scandal. They did things that do not seem clean," the pope said.

These were the first public comments made by Pope Francis on the issue of financial corruption. The pope stressed that the internal investigation was going well.

"For the first time, the dirt is being uncovered from within the Vatican, rather than from outside," Francis said.

Watch video 02:33 Share Thai Catholics gear up for Pope Send Facebook google+ Whatsapp Tumblr linkedin stumble Digg reddit Newsvine Permalink https://p.dw.com/p/3TIe1 Catholics in Thailand gear up for visit from Pope Francis

ed/stb (dpa, KNA)

Each evening at 1830 UTC, DW's editors send out a selection of the day's hard news and quality feature journalism. You can sign up to receive it directly here.