A gunman in Germany has killed two people. Police say the attacker and a woman are dead.It is believed the female vicitm was the gunman’s sister. Two others are in a critical condition and also believed to be family members. The man in his sixties opened fire in a courthouse in the southern German town of Landshut in what is believed to be an inheritance dispute. There are reports the attacker had been sitting in the public area of the courtroom before suddenly opening fire.