A teenager was stabbed to death by her boyfriend's "jealous and obsessed" ex-girlfriend, a court has heard.

Chloe Watson Dransfield, 16, was found with wounds to her neck and back on Kennerleigh Avenue in Austhorpe, Leeds, on the morning of Saturday 28 March and died in hospital a short time later.

Kayla Smith, 18, Archie Rycroft, 20, and Blake Dowling, 18, from Leeds, all deny her murder, a trial at Leeds Crown Court was told.

Smith has pleaded guilty to manslaughter over Chloe's death, having admitted to inflicting the stab wounds, although she said she did not intend to kill or cause serious injury. The other defendants have denied the same charge.

Opening the case earlier, prosecutor Mark McKone KC said Dowling had been in a relationship with both Chloe and Smith and "knew of the bad feeling between the two females".

Dowling had been with Chloe prior to her death and also had a telephone conversation with Smith, who was at her grandfather's house in the Cross Gates suburb with Rycroft.

Chloe and Smith had argued throughout the prior evening, with the defendant threatening to "stab her" several times, the prosecutor said.

The two girls agreed to fight, and Dowling booked a taxi to take Chloe to Smith's home.

Rycroft followed Smith as she left the property to fight with Chloe, with CCTV footage appearing to show him filming her.

McKone said Rycroft was guilty of murder "by walking with Kayla Smith to the fight and by trying to film Kayla Smith using violence and by providing support to her, if needed".

He added that Dowling had earlier heard Smith making threats to stab Chloe and by booking the taxi "played a part in organising the violence, assisted and encouraged Kayla Smith by taking Chloe to the scene for the purpose of fighting".

In a conversation with a friend of Chloe's after the stabbing, Dowling told her he "thought the girls were going to fight normally and didn't know Kayla Smith had a knife in her hand", the jury heard.

Rycroft told police he had followed Smith out of her house "as I was being nosey" and said he did not see a knife in her hand.

Officers who attended the scene said the four people they found at the scene, who included Smith and Rycroft, were "laughing and joking" and using nitrous oxide in front of police, according to McKone.

The prosecutor said Smith later "lied in her interviews" with police.

The court was also told that Smith had sent Dowling a message in the early hours of 28 March which read: "I love you, Blake, I will never find someone that I love like you. Please stop."

She had earlier been overheard telling him: "I'm going to smash your head in, you better not be with no girls."

Giving evidence, Dowling's mother Zoe said her son had been in a relationship with Chloe for about a year, having previously been with Smith for two years which "was not good".

"They would always argue. After they split up she was always trying to cause issues and she became jealous and obsessed with his relationship with Chloe."

Another witness, Charlotte Parker, said she had overheard Dowling, Chloe and another boy arguing with Smith over the phone earlier that evening before they left to travel to the latter's address.

"I didn't know it was going to happen otherwise I wouldn't have let her out of the door," she told the court.

"I was told it [arguing] was common between them."

Chloe, from Gomersal, was struck five times shortly after 05:00 GMT with what was believed to be a kitchen knife, the court heard.

McKone said an unidentified male could "be heard laughing at the time of the stabbing and afterwards".

In the aftermath, as Chloe lay on the street dying, Smith was seen on CCTV talking to her grandfather, Geoff Smith, about the incident.

He told her he was going to ring the police, to which she replied: "You can't ring the police, she's dead."

Geoff Smith eventually called an ambulance, 37 minutes after Chloe had been stabbed, and gave her CPR in the street along with another Kennerleigh Avenue resident.

Chloe died in hospital at 06:40 GMT.

Members of Chloe's family attended Wednesday's hearing wearing T-shirts paying tribute to her.

Several police officers were also in attendance following tensions at previous hearings relating to the case.

Chloe's family previously said they were "utterly devastated" about her death and that she would "never be forgotten".

In a separate tribute, Chloe's mother previously said she "cannot put into words" the loss of her "beautiful princess".

The trial continues.