A 20-year-old man has been arrested over the death of an Israeli student who was killed while walking home late at night this week in Australia.
Her body was found by passers-by in Bundoora, Melbourne, early on Wednesday morning at about the same time as her sister called Australian police.
Police believe she was followed when she got off a tram near her university before being attacked.
No other details about the man being held by police have been released.
Ms Maasarwe had been on the phone with her sister, who heard the phone fall and voices.
The 21-year-old was a student at Melbourne’s La Trobe University. She was on a six-month study abroad programme as part of her degree at Shanghai University.
On the night she was killed, she had been to a comedy gig and was less than 1km (0.7 miles) from her home.
It is the second time in seven months a woman has been killed on her way home from a night out in Melbourne.
Detective Inspector Andrew Stamper said: “Our presumption is that this was a random attack and opportunistic.”
Officers are conducting forensic tests on a baseball cap and a black and grey t-shirt which they believe were left by the attacker.
DI Stamper said: “There will be someone out there who has seen a person wearing this clothing, and we really need them to come forward and provide us with that information.
“We have a grieving family who has had to fly halfway across the world under the most horrific circumstances and we want to be able to give them some answers.”
Officers appealed for information from anyone who saw anything out of place in the area, which is close to the university, between 11pm and 1am, or who travelled on the 86 tram that night.
The Israeli embassy in Australia issued a statement confirming her death and offering its support to the family.
Her uncle Rame Maasarwe told The Age: “She’s positive, she likes to have fun, she’s a very friendly person you know. She’s a good sister.
“She liked to discover new things, see new places. She travelled all over the world.”
He also said the family was shocked by the news, and had believed Australia to be safe.
Some of her friends from university, who asked not to be named, described her as an exceptional student who was positive and kind.
On Ms Maasarwe’s Instagram profile, she had documented her world travels, including some highlights since arriving in Australia.
Her bio on the site read: “The best is yet to come.”
In June, Eurydice Dixon, 22, was followed as she walked home from performing at a comedy club in Melbourne. She was sexually assaulted and killed in a park.
Her death provoked an outpouring of grief and 5,000 people attended a vigil for her.