Dev Hynes has accused Lollapalooza security of assaulting him and his girlfriend, Friends frontwoman Samantha Urbani, just a few hours after his performance at the Chicago festival. The Blood Orange musician took to Twitter to lambast the heavy handedness of security guards and appealed to any witnesses who may have seen the incident.

During his set at Lollapalooza, Hynes delivered an anti-racism speech and sported a homemade t-shirt dedicated to the memory of Jordan Davis, Eric Garner and Trayvon Martin – three African-Americans who lost their lives as a result of senseless police brutality.

Urbani had joined him onstage to tell the crowd to take a stand against police brutality and to film any arrest they saw. In a tweet after the alleged assault she referenced Garner, an asthma sufferer who died last month after being placed in a chokehold by an NYPD officer.

Hynes also condemned Lollapalooza's social media team for deleting comments of support from his fans on its Facebook page and appealed for any witnesses. According to the musician, one of the accused security guards claims that Hynes assaulted him, describing it as "insanity".

Since the incident, Lollapalooza has released a statement: "Late Friday night, we learned of an incident involving an artist and a security guard on site. Since then, we have been in contact with those involved and the authorities, as we work together to resolve the situation. As always, our top priority is to ensure the safety of everyone at the festival."

That's cold comfort to Hynes, who said that he is still in pain and is shocked by what happened – and the irony of the whole thing isn't lost on him, either.