Former Egyptian President Mohammed Morsi has been buried hours after he collapsed in court and died on Monday.

Several members of his family were present.

They had been refused permission to take his body to his home town for a public funeral.

The former Islamist president had been in prison for six years following his overthrow by the army in 2013.

Egyptian state television said he suffered a heart attack, but human rights groups have called for an impartial investigation into his death, saying there were serious questions about his treatment in custody.