Officers have arrested a 37-year-old man on suspicion of murder after offering a £20,000 reward for information leading to his arrest.

Police launched the appeal after the murder of 80-year-old Lea Adri-Soejoko, whose body was found inside a lock-up store at allotments in Sheaveshill Avenue, Colindale in February this year. Her wrists had been tied with a lawnmower cord.

The man Scotland Yard had been seeking was yesterday (Wednesday, May 3) arrested and taken to a south London police station for questioning.

A 40-year-old man had been charged with Lea's murder on March 5.

The force still urges potential witnesses to come forward.

DCI Noel McHugh, said: "I am still keen to speak with those who were in and around the area at the time of the incident. It is important that we continue to build a timeline of the events that led to officers discovering Lea's body in the lock-up store.

"I would also like to hear from any previous owners who may be able to provide us with information about the people who currently tend to or own an allotment.

"Any piece of information, however small, will help my team build a picture of events that tragic day."

Lea's family said: "What is keeping us going is the hope that we will find out the truth about the callous death of our kind and loving mum.

"We need your help, the public, to support us now by assisting the investigation and helping to shed light on Mum's final hours."

To offer information, call the Metropolitan Police's incident room on 020 8785 8099, or tweet @MetCC.

To offer information anonymously, call the independent charity Crimestoppers on 0800 555 111.