A 14-year-old boy and three other teenagers have been found guilty of murdering schoolboy Keon Lincoln who was shot and stabbed outside his home in January.

Jurors returned a guilty verdict against the 14-year-old from Birmingham, as well as a youth aged 16, from Walsall, who was caught on CCTV armed with a large knife as Keon was attacked near his home in Handsworth.

Tahjgeem Breakenridge, 18, and Michael Ugochukwu, 18, were also found guilty of murder.

The 14-year-old was also convicted of possession of a firearm with intent to endanger life, while the 16-year-old, Breakenridge and Ugochukwu were further convicted of having an offensive weapon. Both cannot be named because of a court order.

Jurors at Birmingham crown court have yet to reach a verdict on 18-year-old Kieron Donaldson, who denies murder, and will resume their deliberations on Friday.

During a five-week trial, the court heard how Lincoln, 15, was shot while on the ground and stabbed eight times by a “gang” of attackers clad in masks and gloves at about 3.35pm on 21 January.

He died just over two hours later at Birmingham children’s hospital after suffering stab wounds to the legs and back as well as being shot in the abdomen.

Lincoln’s mother, Sharmaine, joined the crowd of people who gathered around her dying son and was heard to say, “he’s only 15”.

The gunman told jurors he was not at the murder scene but admitted he had lied to police. The court was told Breakenridge, Ugochukwu and the 16-year-old were all caught on CCTV armed with long-bladed knives.

Donaldson, of Perry Barr, is alleged to have “helped and supplied weapons” but not to have been at the scene of the pre-planned attack.

Prosecutor Michael Burrows QC told the court: “Plainly, it’s obvious this attack was planned. The attackers were out together armed with weapons. In the case of [the 14-year-old], he was armed with a gun loaded with ammunition.”

The jury was told a stolen white Ford S-Max car was driven away from the scene and crashed soon after, with forensic evidence from the vehicle tying the defendants to the attack.

The four defendants convicted of murder were all remanded in custody by trial judge Lord Justice William Davis until a sentencing hearing on 29 November.