A 19-year-old gunman who stormed into the headquarters of Dutch national broadcaster NOS demanding airtime Thursday night claimed to be from a “hackers’ collective,” according to a reporter who spoke to the man.

NOS was off-air for around an hour. When it came back, it showed recorded footage of the young man, wearing a black suit, white shirt and black tie and carrying a pistol.

Speaking calmly to someone off-camera, the man said, “We are hired in by intelligence agencies.” Shortly after, police arrived with their guns drawn and ordered the man to drop his weapon and put his hands up. At least five police officers then ordered him to turn around and lie down. He complied and was arrested without a struggle.

Police said in a statement the man demanded airtime and threatened that bombs would go off at several locations around the Netherlands if his demand wasn’t met. Special police units were searching the building.

Prosecutor Johan Bac, who spoke at a news conference in Hilversum, said the suspect was from the small town of Pijnacker near The Hague. Bac said he was being held on suspicion of making a threat, weapons possession and taking a hostage. Prosecutor’s did not release the man’s name.

Officials said they were still investigating the man’s background and the seriousness of the threat he posed.

“There is a major investigation underway to get clarity as quickly as possible about what happened here tonight,” Bac said.

There was no immediate indication that the incident was related to Islamic extremism. Nobody was injured and there were no reports of shots being fired.

NOS reporter Martijn Bink said he spoke to the man after he was arrested and he claimed to be from a hackers’ collective. He didn’t elaborate.

The broadcaster later reported on its website that the man had a silencer on the pistol and threatened a security guard, forcing him to take him upstairs to the editorial offices.

After the man’s arrest, NOS director Jan de Jong told the broadcaster that the headquarters had beefed up security in the aftermath of the attack on satirical newspaper Charlie Hebdo that left 12 people dead in Paris. The media park in Hilversum, home to many Dutch broadcasters, has been tightly guarded for years, since populist Dutch politician Pim Fortuyn was gunned down in a parking lot there in 2002.

While the broadcaster was off-air, a screen on the NOS1 channel read “Please be patient” in Dutch. All staff were evacuated from the building as the situation unfolded and remained outside nearly two hours later as police searched the building. NOS resumed broadcasting from a studio in The Hague.

Staff at NOS led the man into a studio near the one where the 8 p.m. news was to have been broadcast live. He never appeared live on television.

Calls to NOS offices in Hilversum, about 12 miles east of Amsterdam, went unanswered Thursday night.