A man who failed in an attempt to break into Brazil’s Supreme Court killed himself in explosions outside the building Wednesday that forced justices and staff to evacuate, authorities said.

The two strong blasts were heard about 7:30 p.m. after the day’s session finished and all the justices and staff left the building safely, Brazil’s Supreme Court said in a statement.

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

Celina Leão, the lieutenant governor of Brazil’s federal district, said the suspect had earlier detonated explosives in a car in a Congress parking lot, which did not cause injuries.

“His first action was to explode the car. Then he approached the Supreme Court and tried to get in the building. He failed and then there were the other explosions,” Leão said in a news conference.

Local media reported that the car that exploded belonged to a member of Brazil’s Liberal Party, the same of former President Jair Bolsonaro. Leão said only investigations will determine whether the owner of the car is the same man who died in the blasts.

Leão recommended that Congress be closed Thursday to avoid new risks. Brazil’s Senate heeded her call and the lower house will be shut until noon, speaker Arthur Lira said.

“It could have been a lone wolf, like others we’ve seen around the world,” Leão said in a news conference. “We are considering it as a suicide because there was only one victim. But investigations will show if that was indeed the case.”

Leão added only forensics will be able to identify the body, which remained outside the Supreme Court for three hours after the blasts.

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

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

Police blocked all access to the area and the presidential security bureau was conducting a sweep of the grounds around the presidential palace.

Brazil’s federal police said it is investigating and did not provide a motive.

The Supreme Court in recent years has become a target for threats by far-right groups and supporters of Bolsonaro’s due to its crackdown on the spread of false information. In particular, Justice Alexandre de Moraes has been a focus for their ire.

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