A man has been charged with planning a terrorist attack on American military personnel in Britain.

Junead Ahmed Khan, 24, has been charged with intending to commit terrorist acts over the allegations, the Crown Prosecution Service said.

He is also accused alongside his uncle, Shazib Ahmed Khan, 22, of planning to travel to Syria to join Islamic State (IS) - also known as Isil.

The men, both from Luton, will appear at Westminster Magistrates' Court later today.

Both men are accused of one offence contrary to section 5(1)(a) of the Terrorism Act 2006 covering a period between August 1 2014 and May 10 2015.

Junead Ahmed Khan faces an additional count contrary to section 5 dating between May 10 2015 and July 14 2015.

Deborah Walsh, deputy head of counter terrorism at the Crown Prosecution Service, said the charges follow an investigation by Scotland Yard's counter-terrorism command.

She said: "W e have concluded that there is sufficient evidence and it is in the public interest to charge Junead Khan and Shazib Khan with the intention of committing acts of terrorism.

"It is alleged that Junead Khan and Shazib Khan had been planning on travelling to Syria to join the proscribed organisation Islamic State in Levant (Isil).

"It is further alleged that Junead Khan was planning a terrorist attack on US military personnel in the UK and he has been charged with an additional terrorism offence to reflect this.

"The decision to prosecute was taken in accordance with the Code for Crown Prosecutors."

The two men were arrested a week ago in an operation involving officers from the national counter-terrorism network.

Another man, in his 30s, was also detained. He was released without charge last night.

Searches were carried out at two addresses in the Luton area. Scotland Yard said the activity was part of an ongoing investigation into Islamist-related terrorism.