Police have refuted allegations that an ambulance crew was shot at while attending the scene where a man was shot yesterday.

London Ambulance Service and police attended the scene at about 11.15am yesterday to find a man, named locally as Isaiah Bovell, 21, nickname "Ziggy", from Brixton Hill, who had been shot.

He was pronounced dead at the scene just off Poyders Road, on Clapham Park Estate.

Paramedics thought they were being shot at when one of them “heard a whistle-like sound” pass his ear and they kept a “low profile” until firearms police arrived.

A source from the ambulance service said: “The paramedic who was at the scene heard a whistle-like sound going past his ear and thought he was being shot at. He was just being a bit dramatic about it.”

A spokesman for the Met Police said: “Our enquiries suggest that they were not being shot at.”

Mr Bovell is believed to have been shot in the head with a shotgun through a flat window.

He was found lying on the green outside Plummer House.

A 39-year-old-man was arrested at an address on the estate, from which police recovered a firearm and several cannabis plants.

A woman, 27, has also been arrested today in connection with the fatal shooting.

Detectives investigating the incident are currently questioning the pair at separate south London police stations.

DCI Allison said: "This incident happened in broad daylight and I would like to hear from anyone who may have seen or heard anything at the time.

"There will have been people in their homes or passing in their cars who may have witnessed this shooting and I appeal to them to come forward and assist us with our investigation.

"We would particularly like to hear from a man who called the ambulance service shortly after the victim was shot.

"We would also like anyone who thinks they know him to speak to us. He is described as a black male, 5ft 10, wearing a black shiny puffer jacket with cane row hair."

Police are waiting for formal identification and a post mortem examination will take place today at Greenwich mortuary.

An incident room has been opened under Detective Chief Inspector Gordon Allison from Trident.

Anyone who may have witnessed the shooting or has any information should contact the incident room on 0208 247 4554 or Crimestoppers anonymously on 0800 555 111.