German federal investigators are looking into a Duesseldorf bank account held by the father of the gunman who attacked an Orlando nightclub, and are in contact with their American counterparts, a police spokeswoman said.
Germany's Rheinischen Post reported that Seddique Mateen posted the bank information in a 2013 video soliciting donations.
The newspaper said the account is now closed and only received two payments, of €100 and €70.
Mateen, the father of Omar Mateen, has multiple videos online in which he talks about Afghan political issues in Farsi.
He calls himself the "Afghan revolutionary president" but is not a known name in Afghanistan.
Federal Criminal Police Office spokeswoman Barbara Huebner said on Wednesday that her office was investigating to see whether there was any relevance to the Orlando case, but refused further details.