Media playback is unsupported on your device Media caption Faisal Shahzad: "Islam will spread on the whole world and democracy will be defeated" - video courtesy of al-Arabiya

A video has emerged in which the man who attempted to set off a car bomb in New York defends his actions.

Faisal Shahzad says in the tape he is carrying out the Times Square attack as revenge for Muslim fighters, "oppressed and weak Muslims", and "martyrs".

The Pakistani-born US citizen has admitted all charges relating to the attempted attack on 1 May.

A petrol and propane bomb was left in a car but failed to ignite. Shahzad is due to be sentenced in October.

A street vendor saw smoke coming from the vehicle and alerted the police.

I will take revenge on their behalf and I really wish that the hearts of the Muslims will be pleased with this attack Faisal Shahzad

Shahzad was arrested two days later as he tried to take a flight to Dubai from New York's John F Kennedy airport.

In the video, broadcast on the al-Arabiya TV station, Shahzad refers to the US-led war in Afghanistan and to two Islamist leaders killed by US forces - Baytullah Mehsud and Abu Musaab al-Zarqawi of al-Qaeda in Iraq.

"Eight years has passed by in Afghanistan and you will see that the Muslim war has just started," he says.

"This attack on the United States will also be a revenge attack for all the mujahideen... and the weak and oppressed Muslims, for example Baytullah Mehsud and Abu Musaab al-Zarqawi, and all the Muslims and Arabs that have been martyred.

"I will take revenge on their behalf and I really wish that the hearts of the Muslims will be pleased with this attack.

"Islam will spread on the whole world and democracy will be defeated... and the world of Allah will be supreme."

'Muslim soldier'

In a court appearance in Manhattan last month, Shahzad said he wanted to let the US know that if it did not get out of Iraq and Afghanistan and stop drone attacks and meddling in Muslim lands, "we will be attacking US".

Faisal Shahzad charges Attempted use of a weapon of mass destruction

Conspiracy to use a weapon of mass destruction

Possession of a firearm during and in relation to a conspiracy to use a weapon of mass destruction

Attempted act of terrorism transcending national boundaries

Conspiracy to commit an act of terrorism transcending national boundaries

Attempted use of a destructive device during and in relation to a conspiracy to commit an act of terrorism transcending national boundaries

Transportation of an explosive

Conspiracy to transport an explosive

Attempted destruction of property by fire and explosive

Conspiracy to destroy property by fire and explosive

Shahzad, 30, told the court: "One has to understand where I'm coming from. I consider myself... a Muslim soldier."

During their investigation, the FBI traced the purchase of the Nissan Pathfinder SUV to Shahzad, a transaction that eventually led to his arrest.

While being interrogated, Shahzad revealed he had gone to Pakistan's North Waziristan tribal region in December 2009 for bomb training with militants affiliated with the Pakistani Taliban, according to the indictment.

He is also alleged to have received about $5,000 in cash from an identified co-conspirator in Pakistan, whom he understood worked for the Taliban.

It said the same co-conspirator directed a second payment to Shahzad, of $7,000 in April, with which he bought a weapon, material to make the car bomb and the Nissan Pathfinder.