Teen who wanted to show his support to ISIS by killing 1,000 Americans is arrested after his father alerted authorities

A 19-year-old who said he wanted to support ISIS by killing as many as 1,000 Americans has been arrested after his dad alerted authorities.

Justin Nojan Sullivan, a self-described Muslim convert from Morganton, North Carolina, was arrested and faces several charges, including attempting to provide material support to the Islamic State group.

Federal authorities were first made aware of the teen's alleged plot when his father, Richie Sullivan, told emergency dispatchers on April 21 that his son was destroying religious items in their home.

'I don't know if it is ISIS or what, but he is destroying Buddhas and figurines and stuff,' Mr Sullivan, a former Marine, said, according to the criminal complaint filed on Monday. 'I mean, we are scared to leave the house.'

In the background of the call, his son was heard asking: 'Why are you trying to say I am a terrorist?'

When an undercover FBI employee made contact with Sullivan on June 6, the teen told him via email that he was a a Muslim convert, according to court documents.

I liked IS from the beginning then I started thinking about death and stuff so I became Muslim,' he said, according to the complaint.

Two days later, he said he wanted to kill 500 people but the next day said he wanted to kill 1,000 by using biological weapons, a gas bomb and bullets coated with cyanide.

'Even if we get someone in the arm they'll still die because of the poison,' he allegedly said. 'It's vengeance.'

He also told the undercover federal worker that he planned to buy a semi-automatic rifle on June 20 at a local gun show so he could carry out his murderous plan, according to the criminal complaint.

'Our attacks needs to be as big as possible,' he allegedly said. 'We can do minor assassinations before the big attack for training.'

At first he told the FBI that he didn't mean to go through with his plans, but then he said he planned the attacks between June 21 and June 23 because his parents would be out of town.

He claimed that he had looked for possible targets in the online Yellow Pages and had asked the undercover agent to kill his parents.

He also asked for the undercover worker's help with obtaining a silencer.

Sullivan also allegedly promised to send the agent money to kill his parents and to recruit others to the 'Islamic State of America.'

Authorities went to his home on Friday and took him into custody without incident. At his home, they found a silencer, according to the court papers.

Sullivan 'was planning assassinations and violent attacks in the United States,' said Assistant Attorney General for National Security John P. Carlin.