Terrorist Suspect Delivery Driver's Phone Seized By British Police

British police successfully seized a potential suspect's phone before it was locked.

The seized cellphone contained information such as communications with a British ISIS operative in Syria that played animportant role in securing a conviction against Junead Khan.

Junead Khan, 25, a supporter of the Islamic State (IS) extremist group, was found guilty of plotting terrorist acts. He and his uncle Shazib Khan, 23, were also convicted of plotting to join IS in Syria.

When police broke into Khan's home abruptly, they discovered an ISIS-style black flag and a laptop with an article from an al Qaeda magazine entitled "Make a bomb in the kitchen of your mom."

Junead Khan's work as a delivery driver took him near U.S. airbases in eastern England, according to The Associated Press.

Police said he did send "chilling message" to a suspected ISIS fighter of how had an opportunity to kill U.S. soldiers on one of his delivery rounds but failed.

"When I saw these U.S. soldiers on road it just looked simple but I had nothing on me or would've got into an accident with them and made them get out the car," the message read, according to police.

Metropolitan Police Counter Terrorism Commander Dean Haydon said Khan "posed a real risk to public safety," according to Sky News.

"He'd undertaken research and planning to make a pressure cooker bomb... And, what we think is, either before or during the attack, if he'd been compromised in any way he was going to detonate that device and commit suicide," Haydon said.

Both of them will be sentenced May 13. Junead Khan may face a maximum sentence of life in prison.