Parklife Festival: Robert Hart dies after assault Published duration 12 June 2014

image copyright Police image caption Robert Hart was knocked unconscious in front of the main stage

A man has died following a "brutal assault" at a festival in Manchester after his girlfriend was hit with an inflatable doll, police said.

Robert Hart, 26, was knocked unconscious in front of the main stage at the Parklife Weekender Festival on Saturday.

Police have issued an e-fit of a man they want to speak to.

The attacker is described as a man in his late 20s, 6ft (1.8m) tall, with short, curly, black hair.

Greater Manchester Police described him as mixed-race with a muscular build, wearing shorts and a blue, bomber-style jacket with the letter A in white on the front.

Det Insp Richard Eales said: "We believe a confrontation took place following an inflatable doll hitting Robert's girlfriend and I am specifically appealing for witnesses who recall seeing the inflatable doll and the attack on Robert immediately thereafter."

About 60,000 people attended the two-day festival in Heaton Park.