The soldiers were lightly wounded in the attack, one in the face and the other in the hand.

A year after Islamic State suicide bombers killed 32 people in Brussels, Belgian authorities say much remains unclear about who ordered the attacks.

Belgian counter terror prosecutors stepped in to investigate the stabbing of two police officers in Brussels on Wednesday, an indication the case was being treated as a possible militant attack.

The Brussels prosecutor is dismissing reports that a bomb exploded early Monday outside Belgium's criminal institute.

French authorities remain "very cautious" about the information because they receive such notes routinely, the official said.

Taekowndo champion Mourad Laachraoui fought his way to a spot on Belgium's Olympic team two months after his brother was identified as a suicide bomber in the Brussels terror attack.

Despite the heightened security in France since last November's deadly Paris attacks, EgyptAir Flight MS804, a Paris-Cairo flight that crashed early Thursday, was likely brought down by terrorism.

A few weeks before the start of the Cannes Film Festival, French authorities have simulated a bloody attack on the showbiz gala, one of several such exercises in the wake of the March 22 attacks in Brussels.

Paris attacks suspect Salah Abdeslam has been charged with attempted murder over a shootout with police that took place last month in Brussels.

Belgian authorities said Tuesday two more men had been charged with offences related to the Brussels bombings.