A tiger has bitten an apparently drunk woman who broke into a zoo to pet a big cat, US police said.

A Miley Cyrus fan was arrested last week after he allegedly crept into her dressing room in Nebraska.

Two police officers were shot and a suspect was critically injured in a shooting at a hospital today, police in the US said.

A gunman who killed eight people at a busy shopping mall before taking his own life in Omaha, Nebraska last night left a suicide note that was found at his home by relatives, said a law enforcement official.