London Mayor Sadiq Khan has said last night's shocking violence across the capital was "fuelled by the hot weather".

Clashes broke out between police and youths as up to 4,000 teenagers gathered in Hyde Park last night, with one youth stabbed after being chased through traffic nearby.

Meanwhile, in a separate incident in Hackney, dozens of police officers were attacked with missiles as they shut down an illegal rave on an estate, and a water fight between 200 youths in Burgess Park, Peckham, ended in a serious stabbing.

And the night before, in Harlesden, hundreds of youths congreated for a street party that saw a 15-year-old girl knifed in the head.

The Mayor todaythe public disorder was "probably fuelled" by the summer heat, with temperatures soaring to 32C yesterday.

As the hot weather continued into today, Mr Khan urged Londoners to enjoy the weather, but to stay away from any unlicensed events.

Branding the violence "unacceptable", Mr Khan said: "Our police officers do a very difficult job, out on the capital's streets every day working to keep us all safe.

"It is extremely disappointing to hear of several incidents yesterday and overnight, probably fuelled by the hot weather, that led to public disorder and Londoners and police officers getting hurt.

"What took place yesterday wasn't a group of people out enjoying the sunshine, but unacceptable crime and disorder.

"I encourage anyone with any information about those responsible to report it, and to please think very carefully before going along to any unlicensed or spontaneous event.

"It's another beautiful day, and we want everyone to be able to get out there and enjoy it.

"So I urge all Londoners to play their part in ensuring London continues to be one of the safest and the greatest capital cities in the world.‎"

Sources confirmed there were extra officers out across the capital today to help keep Londoners safe.