Najibullah Zazi, 24, and his father Mohammed Zazi, 53, will appear Thursday and prosecutors are expected to argue that the younger Zazi should remain in custody.

Zazi and his father were arrested last week. During a Monday court appearance the judge ruled that Mohammed Zazi could be released from custody as soon as his home was set up for electronic monitoring. The elder Zazi's release could come after Thursday's hearing.

9Wants to Know has learned that after Thursday's appearances the case could be moving to New York.

Mohammed Zazi has been subpoenaed to testify before a grand jury in New York. While he is only being held on charges of lying to investigators in a terrorism investigation, a grand jury could hear evidence on more serious charges.

It's unclear who else might be called to testify before a grand jury or whether Najibullah Zazi could be called too.

As the Zazis await their Thursday court appearances, 9Wants to Know has learned their family will have to move from their Arapahoe County apartment. A notice posted Tuesday on the door says the family's right to occupy the building expires Oct. 3.

The charges against the Zazis stem in part from investigators accusations that Najibullah Zazi is linked to al-Qaeda. Zazi, his father and a New York City man, Ahmad Afzali, 37, are accused of lying to FBI investigators trying to uncover a terror plot. All three men were arrested on Saturday in Colorado and New York respectively.

The charge of lying to federal investigators carries a maximum of eight years in prison and a $250,000 fine.

Authorities say they found bomb-making instructions on a hard drive on Najibullah Zazi's laptop computer after he was stopped in a rental car approaching New York City.

Last week, Najibullah Zazi voluntarily met with federal authorities on three occasions. During those meetings, he told investigators he had never seen the document found on the laptop and that he must have unintentionally downloaded it as part of a religious book, which he says he later deleted because it contained talk of jihad.

Federal handwriting analysts say there were characteristics in common between the notes and with samples submitted by Najibullah Zazi, however the final conclusion had not yet been made.

The affidavit also says the document was sent between three e-mail accounts in early Dec. 2008. The FBI believes Najibullah Zazi had control over all three e-mail accounts because two of the accounts had the same nine-digit password, and the third had a six-digit password matching the first six digits of the nine-digit password.

A state terrorism official tells our partners are The Denver Post that no additional arrests are expected in Colorado.

However, a law enforcement official told the Associated Press several people in Queens, New York, are being questioned for a second time.

Imam Ahmad Afzali who is accused of tipping off Najibullah Zazi about the investigation, will also have a detention hearing Thursday morning in New York.