Pakistan's Interior Minister Chaudhry Nisar Ali Khan has ordered an investigation into the mysterious death of a Pakistani woman living in England after her husband claimed she was killed for marrying against her family's wishes.

A ministry statement said Wednesday that Khan has asked police to swiftly complete the probe into the death of Samia Shahid, 28, of Bradford. Shahid died while visiting her family in Pakistan.

Nabila Ghazanfar, a police spokeswoman, told The Associated Press that police were alerted about Shahid's death by her parents on July 20.

She said officers were waiting for Shahid's post-mortem report when her husband Mukhtar Kazim told police he believed she was killed by her family.

Ghazanfar said the exact cause of Shahid's death is not clear and police are still questioning suspects.