The killing of an Islamic State recruit who was raised in Scotland has led to calls for greater scrutiny of British drone strikes.

Ruhul Amin from Aberdeen died alongside two others in the Syrian city of Raqqa in August 2015.

One of those men, another British national named Reyaad Khan, was the target of the attack.

He was described in a parliamentary report published on Wednesday as a "very serious threat to the UK".

The attack was the first time Britain had carried out a lethal drone strike outside of combat.

In its newly published report, the UK Parliament's Intelligence and Security Committee (ISC) calls for greater scrutiny of drone strikes and says the decision-making process "should be more transparent".

ISC chairman Dominic Grieve MP, said: "It is to the agencies' credit that their investigation of Khan's activities led to the disruption of the attacks he planned, thereby avoiding what could have been very significant loss of life.

"Nevertheless, our inquiry into the intelligence on Khan has revealed wider policy issues surrounding the strike itself - notably around the ministerial decision-­making process and the assessment of collateral damage.

"The government should be more transparent about these matters and permit proper scrutiny of them."

The ISC did not attempt to establish the legality of the strike and was unable to determine its necessity because a crucial document was withheld.

The decision was described as "profoundly disappointing" by Mr Grieve.

The ISC reported: "The other occupants of the car travelling with Khan might have been legitimate targets in terms of the law - they were, after all, travelling with a known Isil attack planner, in Isil-controlled territory.

"Even if they were not targets in their own right, they may nevertheless have been deemed acceptable collateral damage."

Ruhul Amin, also known as Abdul Rakib Amin, was born in Bangladesh but grew up in Froghall, Aberdeen. He later moved to Leicester with his family.

In a series of interviews with ITV, Amin insisted he was not radicalised in Scotland and said he had travelled to Syria after learning about Islamic State on the internet.

He appeared in a recruitment video called There is No Life Without Jihad and said he wanted "to die for the sake of Allah".