Neighbours in a council estate heard a man screaming for help as as he was being stabbed to death outside their homes, a court heard today.

Mahad Mohammed, 20, of Sporle Court, in Battersea's Winstanley Estate, was found collapsed at the end of a trail of blood in Pennethorne House, Wye Street, on June 22 last year.

Jermaine Sawyers, 19, of no fixed abode, Cori Lindsey, 19, of Carmichael Close, Wandsworth and Omar Harrison, 19, of Kenmore Road, Harrow deny his murder.

The Old Bailey heard today Mr Mohammed's screams for help woke neighbours living in Pennethorne House who rushed to his aid.

Joyce Ariaoni, who has lived in the block for many years, said her daughter woke her up after hearing him screaming for help close to the former doctor's surgery outside their bedroom window.

She said she saw a group of boys wearing hooded tops and woolly hats make off in the other direction.

Pressed about how many people she had seen, Miss Ariaoni said: "I heard a man screaming outside. He was shouting 'please help, please help! Call 999!'

"I saw this young man struggling to try to find something to hold onto. He was still shouting 'please help!'.

"I can remember four or five. I was sleeping and just got up and I was concentrating on the gentleman who was shouting."

Chelsea Andrews, who gave evidence from behind a screen, said she rushed to help Mr Mohammed after he screamed in Somalian through the block's intercom system.

She said: "I heard some shouting, it is not uncommon in the estate. I heard a man's voice scream.

"I looked out of my bedroom window, I saw one man in a black hoody running off in the opposite direction.

"I saw four people walking another way. I heard him shouting on the intercom and went out to help him."

Ceejay Jepson was going to bed when he was alerted to arguing outside his window. He called for an ambulance when he saw Mr Mohammed lying on the floor.

He was given instructions over the phone on how to perform CPR, rushing to assist Mr Mohammed who was covered in blood.

Mr Jepson said: "It seemed like there was a lot of arguing going on, but I heard it all of the time because I live on an estate.

"But then I heard someone screaming for help, he was clutching his chest screaming for help. I just saw the guy struggling, I called 999."

Mr Jepson said he heard rumours the former doctor's surgery outside the flats had a reputation for drugs.

During the trail it was said Mr Mohammed was clutching a wad of cash when he died.

The trial continues.