A man who failed in his attempt to enter Brazil’s Supreme Court killed himself in explosions outside the building on Wednesday, forcing judges and staff to evacuate, authorities said.

Brazil’s Supreme Court said in a statement that two powerful explosions were heard around 19.30 after the session ended that day, and all judges and staff left the building safely.

Local firefighters confirmed one person died at the scene in the capital Brasilia but did not identify him.

Celina Leão, deputy governor of Brazil’s federal district, said the suspect had previously detonated explosives in a car in the Congress parking lot and that this did not cause injuries.

“His first action was to blow up the car. He then went to the Supreme Court and tried to enter the building. It failed and then there were other explosions,” Leão said at a press conference.

Local media reported that the car that exploded belonged to a member of the Brazilian Liberal Party and former President Jair Bolsonaro. Leão said only investigations would determine whether the owner of the car was the same man who died in the explosions.

Leão recommended closing Congress on Thursday to avoid new risks. Spokesperson Arthur Lira said that he heeded the call of the Brazilian Senate and that the lower house would be closed until noon.

“He could have been a lone wolf like the others we’ve seen around the world,” Leão said at a press conference. “We consider this a suicide because there was only one victim. However, investigations will show whether this is really the case.”

Leão added that only forensic experts could identify the body, which remained outside the Supreme Court for three hours after the explosions.

The explosions in front of the Supreme Court took place about 20 seconds apart in the Three Powers Plaza in Brasilia, where Brazil’s main government buildings, including the Supreme Court, Congress and the presidential palace, are located.

President Luiz Inácio Lula da Silva was not at the neighboring presidential palace at the time, spokesman José Chrispiniano said.

Police blocked all access to the area and the presidential security bureau combed the grounds around the presidential palace.

Brazilian federal police said the investigation was ongoing and did not provide a motive.

The Supreme Court has been the target of threats from far-right groups and Bolsonaro supporters in recent years over its crackdown on the spread of misinformation. Judge Alexandre de Moraes in particular became the focus of their anger.

Lula’s spokesman said late Wednesday that the leftist leader met at the presidential residence with federal police chief Andrei Rodrigues, Supreme Court Justices de Moraes and Cristiano Zanin.