A man has been arrested on suspicion of murder by police investigating the death of south-east London primary school teacher Sabina Nessa.
A 38-year-old man was arrested in East Sussex. Scotland Yard Police described it as a “significant development”.
Ms Nessa’s family has been informed of the development, the Met Police said.
The 28-year-old was attacked while walking to meet a friend at The Depot bar, Kidbrooke, on 17 September.
She had earlier left her home in nearby Astell Road and her body was found the next day in Cator Park by a member of the public.
Scotland Yard previously released CCTV footage of a man filmed walking close to the park, through Pegler Square, on the night Ms Nessa was attacked.
Two other men arrested last week on suspicion of murder were later released pending further investigation.
On Friday, more than 500 people joined a vigil in Pegler Square during which the teacher’s sibling Jebina Yasmin Islam told the crowd she had “lost an amazing, caring, beautiful sister, who left this world far too early”.
She said her family’s “world is shattered, we are simply lost for words”.
Members of her family also spoke at a rally at East London Mosque, while a candle was lit outside No 10 Downing Street in memory of the school teacher.