Four young people have died after the quad bike they were travelling on crashed into a sports car in West Yorkshire.
Here's what we know so far about the tragedy and the four friends who died.
- The unlicensed quad bike was involved in crash with a bronze Nissan 350Z sports car on in the early hours of Sunday
- The collision happened on the A6201 between Upton and Hemsworth in West Yorkshire at around 12.34am
- Three of the victims died at the scene while one of the men died in hospital from his injuries
What's the latest with the police investigation?
- Two men, aged aged 21 and 22, who were in the car, have been arrested on suspicion of dangerous driving
- They remain in custody
- Police say "painstaking investigative work" into the tragic accident is underway and have appealed for witnesses to come forward
Who were the victims?
The victims have been named locally as Ryan Beal, Brandon Brown, Alexandra Binns and Terrie Kirby, also known as Terrie Lynch.
They had reportedly been celebrating Terrie's 16th birthday.
Friends and relatives have spoken of their heartbreak on social media.
Ryan Beal, 20
Mr Beal was driving the quad bike at the time of the tragedy.
The father-of-one - who reportedly worked as a window fitter - was just days away from celebrating his 21st birthday.
Speaking from Upton Rugby Club, where Mr Beal used to play, his brother Steve, 26, said:
Brandon Brown, 20
Brandon died of head injuries at Leeds General Infirmary hours after the crash.
He had been best friends with the driver of the bike, Ryan Beal.
"They had known each other since they were at school and were really good mates,” Ryan's brother Steve is quoted as saying.
Alexandra Binns, 18
Tributes poured in after Alexandra Binns was named as one of the victims of the crash.
Terrie Kirby, also known as Terrie Lynch, 16
Terrie Lynch was reported to have been celebrating her birthday just hours before the accident.
She was described as a "beautiful young lass" in emotional tributes from friends and relatives.