Former Trump campaign manager Paul Manafort held secret meetings with WikiLeaks founder Julian Assange inside the Ecuadorian embassy in London, the Guardian reported Tuesday, citing unnamed sources.

The British publication said Manafort went to see Assange in 2013, 2015 and then around the time he joined the campaign.

The Guardian said, according to a “well-placed source,” a casually dressed Manafort met with Assange for about 40 minutes around March 2016.

Ecuadorian sources said the visit would normally have been logged, but they told the Guardian the 2016 visit was not.

The paper said it was “unclear why Manafort wanted to see Assange and what was discussed.”