Catholic electric pop group Ooberfuse have written a track in honour of Shahbaz Bhatti, who was gunned down by militants nearly a year ago.

Bhatti, Pakistan's Minorities Minister and the only Christian in the Pakistani Parliament, was assassinated on 2 March 2011. He had been an outspoken defender of Pakistan's Christian and other minorities.

Ooberfuse have dedicated "Blood Cries Out" to all those who have lost their lives in defence of the marginalised and oppressed.

The band have been invited to perform at a peace rally being held in Bhatti's memory in London's Trafalgar Square on 10 March.

They will perform their song, which is free to download from their website: www.ooberfuse.com

The band's front woman, Cherrie Anderson says: "We were very touched to have been asked to participate in the rally and concert.

"It proved to be a grave and solemn undertaking to capture musically the sense of outrage which the spilling of innocent blood naturally arouses. We had to balance these feelings with a heart-felt cry to those forces in the world that feed on violence.

"A positive message of peace and reconciliation is contained in the song. We hope it will help to defuse the rage that fuels such atrocities and abominations."

Band member Hal St John explains: "We watched an interview with Shahbaz weeks before he was killed in which he anticipates further suffering and continuing death threats.

"The song, 'Blood Cries Out', samples a phrase from the interview in which Shahbaz says he has experienced already the suffering of the cross. It is a tragic irony that Shahbaz’s message to those who would listen was Christ’s very own - 'Do not kill in the name of religion, but love each other'."