Diane Abbott has been slammed for posting a fake image of a bombing raid in a social media post about the Syrian air strikes.
The shadow home secretary dismissed as "pathetic" the row over her use of the picture, which shows a huge explosion hitting what appears to be a residential neighbourhood.
Ms Abbott posted it in a tweet criticising International Development Secretary Penny Mordaunt, who was defending the Government's refusal to hold a parliamentary vote before launching air strikes early on Saturday morning.
Twitter users pointed out that the dramatic picture was actually a composite showing what a fictional Israeli air strike in Tehran might have looked like, rather than the real missile strikes on Syria.
Theresa May and Cabinet ministers have repeatedly said that the air strikes targeted chemical weapons facilities, taking care to avoid civilian casualties.
Ms Abbott dismissed criticism over her choice of image, saying: "Apparently, my use of this pic is 'important news'. Yes, UK goes to war without UN approval or even parliamentary debate.
"But the most important news is what pics I use in a tweet. Pathetic."
The RAF's involvement in the joint operation with the US and France saw Tornado jets launch storm shadow missiles at the Him Sinshar chemical weapons storage site.
Tory MP James Cleverly said Ms Abbott had undermined her case by using a "deeply dishonest image" and accused her and Labour leader Jeremy Corbyn of "anti-West prejudice".
Demanding an apology, he added: "To imply that this was a attack on civilian homes, as the picture does, is a vile misrepresentation and dishonours the RAF personnel involved."
