Witnesses describe the gunman as slim , 5-foot-9 , prosecutor Francois Molins says . The man was wearing a black T-shirt and blue jeans, prosecutors said. Interior Minister Claude Gueant says authorities looking at possible neo-Nazi involvement . France observed a minute of silence in memory of the victims on Tuesday morning , with President Nicolas Sarkozy marking it at a school in Paris . The gunman who killed 4 at a Jewish school was wearing a camera , the minister says .
Witnesses describe the gunman as slim , 5-foot-9 , prosecutor Francois Molins says . The man was wearing a black T-shirt and blue jeans, prosecutors said. Interior Minister Claude Gueant says authorities looking at possible neo-Nazi involvement . The gunman who killed 4 at a Jewish school was wearing a camera , the minister says .