The UK, France and Germany have demanded "credible facts" from Saudi Arabia after the kingdom admitted dissident journalist Jamal Khashoggi was killed inside its Istanbul consulate.

Riyadh has claimed the Washington Post reporter died in a “brawl” at the building, a version of events that has been widely disputed.

Saudi authorities are facing increasing international pressure to explain what happened after Khashoggi entered the consulate on 2 October, with US politicians calling for the kingdom to face sanctions and directly accusing Crown Prince Mohammed bin Salman of ordering his murder.

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Turkish authorities investigating Khashoggi’s death suspect the journalist was tortured and then murdered by a team of hit men before his body was cut up and disposed of.

An anonymous Saudi official has claimed Riyadh was trying to convince Khashoggi to return to his homeland by offering him a lucrative job as incentive to stop his criticism of the regime.

He then suggested the situation escalated into a fight, which ended in the reporter’s death.

However, this account has been disputed, with questions raised over why a doctor reported to be an expert in forensic medicine was among the 15 men thought to have confronted Khashoggi.

Donald Trump, who initially said he believed the Saudi account, has now said the US wants to get to the bottom of what took place inside the consulate.

In Europe, German chancellor Angela Merkel has described the Saudi explanation of Khashoggi’s death as “inadequate”, while her foreign minister has said Berlin will reassess its arms sales to the kingdom.