Fico, 59, was attacked as he greeted supporters following a government meeting Wednesday in the former coal mining town of Handlova. The suspect was tackled to the ground and arrested.
The update on Fico’s health was issued as the man accused of attempting to assassinate him made his first court appearance, according to Slovak state media.
Prosecutors were seeking an order from Slovakia’s Specialised Criminal Court to detain the suspect.
Government authorities gave details that matched that description. They said the suspect did not belong to any political groups, though the attack itself was politically motivated.
The courthouse in Pezinok, a small town outside the capital, Bratislava, was guarded by officers wearing balaclavas and carrying rifles. News media were not allowed in and reporters were kept behind a gate outside.
Police on Friday had taken the suspect to his home in the town of Levice and seized a computer and some documents, Markiza, a Slovak television station reported. Police did not comment.
With police remaining largely silent about the case, it was not clear how the suspect came to possess a firearm.
Slovakia has strict rules on firearms and gun owners must have a good reason to possess one and are required to pass a test.
As a consequence, Slovakia has one of the lowest gun ownership rates in Europe. It was ranked 23rd out of 27 European Union countries with a gun ownership rate of 6.5 per 100 people, according to the Association of Accredited Public Policy Advocates to the EU.
World leaders have condemned the attack and offered support for Fico and Slovakia.
Fico has long been a divisive figure in Slovakia and beyond. His return to power last year on a pro-Russia, anti-American platform led to worries among fellow European Union and Nato members that he would abandon his country’s pro-Western course, particularly on Ukraine.
At the start of Russia’s full-scale invasion in February 2022, Slovakia was one of Ukraine’s staunchest supporters, but Fico halted arms deliveries to Ukraine when he returned to power, his fourth time serving as prime minister.
Fico’s government has also made efforts to overhaul public broadcasting – a move critics said would give the government full control of public television and radio. That, coupled with his plans to amend the penal code to eliminate a special anti-corruption prosecutor, have led opponents to worry that Fico will lead Slovakia down a more autocratic path.
Thousands of demonstrators have repeatedly rallied in the capital and around the country of 5.4 million to protest his policies.
Fico said last month on Facebook that he believed rising tensions in the country could lead to the killing of politicians, and he blamed the media for fuelling tensions.
Before Fico returned to power last year, many of his political and business associates were the focus of police investigations, and dozens have been charged.
His plan to overhaul the penal system would eliminate the office of the special prosecutor that deals with organised crime, corruption and extremism.