POLICE have arrested another man on suspicion of murdering 24-year-old University of Greenwich student Samuel Guidera.

Met Police officers arrested an 18-year-old at a residential address in Sydenham at around 7am this morning, and he is being questioned at a south London police station.

The 39-year-old man arrested yesterday morning at an address in Penge has now been released on bail pending further inquiries, and has been ordered to return to the station in April.

Mr Guidera was found collapsed in the street in Newlands Park, opposite the junction of Bailey Place, at around 9.55pm on Saturday, around 200m from Penge East railway station.

He was rushed to hospital, but was pronounced dead at around 10.55pm, after suffering a single stab wound to the heart.

Officers will be at the scene of the crime from 8pm tomorrow evening to hand out leaflets to the public, in the hope of jogging the memory of someone who could have vital evidence.

Detective Lawrence Smith said: "Sam came from a loving family who are devastated as they struggle to come to terms with his death.

"We particularly want to hear from people who got off the train at the same time as Samuel.

"Were you on the 21:25hrs Victoria to Orpington train?

“The train arrived at Penge East station at 21:41hrs when Samuel Guidera got off the train.

“Did you get off the train at the same time? You may hold crucial information for this investigation.

"Samuel was carrying a distinctive pink T-mobile carrier bag which someone may remember."

Mr Guidera lived in Avenue Road, Beckenham, with his parents and sister, and worked part time at the Sainsbury’s in Bell Green, Sydenham.

He was studying history and politics at university and hoped to become a teacher.