The Slovakian prime minister “escaped death by just a hair,” after he was shot in the stomach in an assassination attempt on Wednesday.
Mr Fico, 59, was injured after five shots were fired outside the House of Culture in the town of Handlova where the leader was meeting with supporters.
In an update on Thursday, Slovakia’s president-elect Peter Pellegrini said the PM is still “critical” as he is living “the worst hours and days of his life”.
He added that if the bullets struck just a few millimetres either side, the Mr Fico would have been killed.
Suspect Juraj Cintula, 71, believed to be a former security guard and poet, was charged with attempted murder and faces up to 25 years in prison.
He is believed to have attended anti-government protests, and in social media posts referred to having disagreements with Mr Fico’s policies.
Mr Fico, a well-known ally of Russian president Vladimir Putin, is a divisive figure in Slovak politics, with the European Union Parliament elections due to take place in three weeks.