Jay Z and Beyoncé meet families of Freddie Gray and Mike Brown in Baltimore

The couple were in the US city for Prince's Rally 4 Peace concert on Sunday (May 10)

Jay-Z and Beyonce met with the families of Freddie Gray and Mike Brown, two African-American youths recently killed during altercations with police in the US.

Gray, 25, died in police custody in Baltimore during April, with several police officers later charged with his death following alleged mistreatment. 18-year-old Brown, meanwhile, was shot dead in Ferguson, Missouri during August 2014 by a white police officer. The incident led to civil unrest in Ferguson, with the US Department of Justice later clearing the officer involved of wrong doing.

Over the weekend, Prince hosted a Rally 4 Peace concert in Baltimore, urging protesters to wear the colour grey to honour Freddie Gray.

Jay Z and Beyoncé attended the event, which took place on Sunday (May 10), meeting Gray and Brown’s families, along with Alicia Keys. Photos posted to Beyoncé fan accounts on Instagram showed Beyoncé and Jay Z’s with Gray’s family and Beyoncé and Keys with Mike Brown’s mother. See those photos below.

Beyoncé & Jay Z with #FreddieGray’s family. #Rally4Peace

A photo posted by Beyoncé (@beylite) on

Beyoncé, Alicia Keys & Miss Tina with #MikeBrown's mother. #Rally4Peace

A photo posted by Beyoncé (@beylite) on

Prince’s Rally 4 Peace concert is airing now online and was streamed live on Tidal. The Jay-Z owned streaming service removed its paywall and sign-up process and allowed visitors to listen to audio from the concert live and for free. Tidal’s homepage also featured a “match funds” donation button to encourage support for local Baltimore youth charities.

Commenting on Tidal’s support, Jay-Z said: “I am honoured to join Prince in his mission to inspire through the uniting power of music and be able to offer a platform where this moment can be shared globally. We invite all to experience the music and contribute in their own way to promote peace, tolerance and understanding. Our prayers go out to Freddie Gray’s family and every family affected by brutality and senseless violence.”