A terrorist network led by a Yemeni national planned to kill the US ambassador by firing a rocket-propelled grenade//into//his car in northern Lebanon earlier this year, judicial officials said yesterday.

　　The attack never materialized and the officials, speaking on condition of anonymity, had no other details on how the plot was foiled. But three Lebanese newspapers, citing security and other judicial sources, said yesterday the attempt during a visit by US Ambassador Vincent Battle to the northern port city of Tripoli on January 15 was foiled when the envoy's motorcade changed its planned route.