An elderly man was set on fire and was left suffering severe burns as police launched a manhunt.
Metropolitan Police were called at about 8pm on February 27 to West London after an 82-year-old man was set alight.
Police have released an image of a man they want to speak to in reagrds to the shocking event.
The suspect was seen speaking to the victim as they both left West London Islamic Centre, police said.
On the street, the victim was then doused with a liquid, which is believed to be petrol, before being set alight with a lighter.
The suspect then walked away.
The victim was taken to hospital where he received treatment for severe burns to his face and arms.
Detective Sergeant Steven Constable, said: “I know this will be an incredibly shocking incident for the community and we are carrying out a full investigation into what happened. Understandably, there is a great deal of local concern in the wake of this incident and local officers have been carrying out reassurance patrols daily at the mosque.
"We are continuing to work alongside the West London Islamic Centre who have been very supportive of our investigation and have been assisting us with our enquiries.
“A key part of that is identifying the man in the image we have released. If you recognise this man I would urge you to get in touch, either directly with police or to remain anonymous, contact Crimestoppers. I would also urge anyone who witnessed this incident and has not yet spoken to police to please get in touch.”
If you recognise the man in the image or have any other information that could help the investigation please call the police on 101 and give reference 6422/27FEB.
Alternatively, you can contact the independent charity Crimestoppers anonymously on 0800 555 111.