Facebook has removed pro-Leave and pro-Remain status update suggestions from a list given to users, BBC says.
On Tuesday, Berlin-based British political blogger Jon Worth noticed that he had been given a suggested update of "in favour of leaving the EU" - but not one related to remaining. It added that both pro-Leave and pro-Remain prompts had now been removed, due to the sensitivity of the vote.
The two options are shown, together, only if users search for "EU". The British public will vote in a referendum on whether the UK should remain in or leave the European Union, on 23 June.
When Facebook users post an update to the site, it is possible to receive a recommendation for what to say regarding what they are doing or how they are feeling.
After Worth looked under status update suggestions via the Facebook app on his iPhone, however, one option, "in favour of leaving the EU", appeared without another on the side of remaining in the European Union.
A Facebook spokesman denied allegations that the social network was influencing the tone of political debate on the site.
"People who search for 'EU' when they are using our status tool will see a full range of options enabling them to add if they are thinking of leaving or remaining in the EU," he said.
"People scrolling through the list of activities see options based on what their friends and other people have been using."