A convicted murderer is under investigation after posting photographs of his birthday cake and a kebab on Facebook.
Liam Whitnell is serving a life sentence after he and three others stabbed a man to death in front of his wife and sister in 2011.
He is alleged to have uploaded photographs to Facebook showing his 31st birthday celebrations at Wandsworth Prison.
The photographs include one showing a takeaway kebab, a superhero-themed birthday cake and another of three fellow inmates posing with their smartphones.
A Prison Service spokesman said: “No prisoner should be in any doubt that if they break the rules they will be stripped of their privileges and could face further disciplinary action.
"These claims are being investigated as a matter of urgency.”
Whitnell was jailed for a minimum of 24 years last year.