A mum and her two kids were taken to hospital after an incident involving a “corrosive substance” in Clapham.

Emergency services were called to Lessar Avenue yesterday (January 31) at around 7:25pm.

Three victims, a woman and her two children, were treated by paramedics before being taken to hospital.

Their conditions are currently unknown.

A total of nine people including the victims were treated by paramedics - with five taken to a major trauma centre and one discharged at the scene.

A number of resources were sent to the scene, including members of the London Ambulance Service's Hazardous Area Response Team.

The Metropolitan Police has said that at this stage in the investigation it is believed that the substance used was corrosive.

A man was seen fleeing the scene and Metropolitan Police has said it is drawing resources from across the force to apprehend the individual and determine the circumstances leading up to the attack.

No arrests have been made.

Detective Superintendent Alexander Castle said on Wednesday night: “Officers are on scene following this horrific incident.

"Three victims - a woman and her two young children - have been taken to hospital for treatment.

"Three other people - all adults - have been taken to hospital for injuries sustained, we believe, as they came to their aid.

"We will update as soon as we know more about their conditions.

"Three police officers have also been taken to hospital after they responded to the incident. Thankfully we believe their injuries to be minor.

"While tests are ongoing to determine what the substance is, at this stage we believe it to be a corrosive substance.

"A man was seen fleeing the scene. We are drawing on resources from across the Met to apprehend this individual and work is ongoing to determine what has led to this awful incident.

"The National Police Air Service are assisting us. Any members of the public who can help us with information or material should call 999 immediately ref CAD 7790/31 Jan."

A spokesperson for London Ambulance Service said: “We were called today (31 January) at 7:29pm to reports of an incident on Clapham Common South Side, SW4.

“We sent a number of resources to the scene, including two incident response officers, three ambulance crews, and members of our hazardous area response team (HART).

“We treated nine people, five of whom were taken to a major trauma centre.

“Three patients were taken to a local hospital and the other was discharged at the scene.”

London Fire Brigade said in a statement: "Firefighters were called to a chemical incident on Lessar Avenue in Clapham this evening.

"Working alongside emergency service partners, crews provided immediate emergency care to a woman and two children. Five further people were also treated at the scene. They were all taken to hospital by London Ambulance Service crews.

"Crews also used specialist equipment to detect a corrosive substance that is believed to have been used in the incident."