Belgian Prime Minister Charles Michel told broadcaster RTL that a machete attack in Charleroi in which two police officers were wounded before the attacker was fatally shot appeared to be a terrorist incident.
"Initial indications very clearly point towards terrorism," Mr Michel told the television channel.
The machete-wielding man yelling "Allahu Akbar" (God is greatest) injured the two female police officers before being shot outside the main police station in the southern Belgian city of Charleroi.
The attack in the city of Charleroi, around 60kms south of Brussels, left one of the officers with "deep wounds to the face" while the other was slightly injured, Belga news agency said.
The attacker, who was shot by a third officer subsequently died of his wounds.
There was no immediate indication of the man's identity; Belgian media reported that the attacker had no papers with him.
A spokesman for the federal prosecutor said the authorities expected to be able to issue more information tomorrow morning.
Local media reported that Mr Michel was returning from holiday and would meet with the security services tomorrow.
Belgian Interior Minister Jean Jambon condemned a "disgusting act in Charleroi" on his Twitter account and said the country's terror threat level - currently at level three on a scale of four - would be examined.
Those attacks were claimed by the so-called Islamic State (IS) jihadist group, which controls large areas of territory in Iraq and Syria and has claimed numerous terror attacks in Europe in the last year.
Belgian police have carried out dozens of anti-terror raids since the attacks in Paris.
Last month they arrested and charged a 33-year-old man, identified as Nourredine H, with attempting to commit "terrorist murder" and "taking part in the activities of a terrorist organisation".
Prosecutors said there was, for now, no link to the Brussels suicide bombings.
Belgium is the main source per head of population of jihadist recruits going from European Union countries to fight with IS in Syria, causing deep concern that they will return home battle-hardened and even more radicalised.
The interior ministry said 457 Belgian men and women had gone or tried to join jihadists in the Middle East, including 90 who are missing or dead.
Belgium launched its first attacks against IS in Iraq in late 2014 as part of a US-led coalition. It joined a similar anti-IS operation in Syria this year.
Several of those involved in the Brussels bloodshed in March were directly linked to the 13 November attacks in Paris.
In June, Belgian authorities charged two men with terrorist offences amid reports of a planned attack on a Euro 2016 fanzone in central Brussels.
Belgium then beefed up security for its 21 July national day celebrations after a truck attack that killed 85 people in the French city of Nice on Bastille Day on 14 July.