Police gave no details about the victims or a possible motive for the shooting at the building located near the Vltava River in Jan Palach Square. Czech Interior Minister Vit Rakusan said investigators do not suspect a link to any extremist ideology or groups.

Vondrasek said police believe the suspect killed his father in his hometown of Hostoun, just west of Prague, earlier in the day, and that he had also been planning to kill himself. He didn’t elaborate.

The chief described the suspect as an excellent student but didn’t provide any other information.

An ambulance drives towards the building of the Philosophical Faculty of Charles University in downtown Prague after a shooting in which 10 people were killed. Photo / AP

The gunman suffered “devastating injuries” but it wasn’t clear if he killed himself or was shot to death in an exchange of gunfire with officers, Vondrasek said, adding that there was “nothing to suggest that he had an accomplice.”

The shooter legally owned several guns, and what he did was “well thought out, a horrible act,” Vondrasek said.

“We mourn the loss of life of members of our university community, express our deepest condolences to all the bereaved and our thoughts are with all those affected by the tragedy,” Charles University said in a statement.

University authorities said they would tighten security in university buildings with immediate effect.

The building where the shooting took place is near the Vltava River in Jan Palach Square, a busy tourist area in Prague’s Old Town. It is just a few minutes’ walk from the picturesque Old Town Square, a major tourist attraction where a popular Christmas market attracts thousands of visitors.

The government quickly sought to quell concerns that the massacre was back by foreign interests.

“There’s no indication that it has anything to do with international terrorism,” Rakusan said.

“It’s a horrible crime, something the Czech Republic has never experienced,” he said.

Pavel Nedoma, the director of the nearby Rudolfinum Gallery, said he watched from a window as a person standing on a balcony of the building fired a gun.

Authorities evacuated everyone from the building and police said they were still searching the area, including the balcony, for explosives.

The building forms part of the square and faces a bridge across the river with a view of Prague Castle, the seat of the Czech presidency. President Petr Pavel said he was “shocked” by what happened and offered his condolences to the relatives of the victims.

Where tourists, students and others would normally be enjoying the view of the iconic monument, chaos and terror instead took hold. Police vehicles and ambulances sped across the bridge with their sirens wailing. Officers sealed off the empty square.

Some video footage showed people being evacuated from the building and others trying to hide by a wall.

The Czech government planned to meet later on Thursday for an emergency session to discuss the shooting.

Before this incident, the nation’s worst mass shooting was in 2015, when a gunman opened fire in the southeastern town of Uhersky Brod, killing eight before fatally shooting himself.