An anti-terrorism court in Pakistan has issued an arrest warrant for former military ruler Pervez Musharraf over the assassination of opposition leader Benazir Bhutto in 2007.

Prosecutors say he was aware of Taliban plans to target Ms Bhutto but did not act to prevent her murder in Rawalpindi.

They accuse him of failing to provide adequate security for the former prime minister.

Mr Musharraf - who lives is a self-imposed exile in London - denies the accusations.

A spokesman said there was no basis for the case, which was "a politically motivated court ruling", and Mr Musharraf had no intention of returning to Pakistan for the hearing.

Ms Bhutto was killed while travelling in an election motorcade in the city of Rawalpindi on 27 December, 2007.

She was twice prime minister of Pakistan, from 1988 to 1990, and from 1993 to 1996. Her husband, Asif Ali Zardari, is now president.

Mr Musharraf seized power in a coup in 1999 when he ousted Prime Minister Nawaz Sharif. He resigned as president in 2008.