"route flush" does not delete routes created with -interface option

Is there a way to get rid of all the routes in a routing table ? This is more or less what I do: route add 146.64.80.0/24 192.168.0.100 route add 146.141.0.0 -interface tun1 route add 146.182.0.0 -interface tun1 route add 146.230.0.0 -interface tun1 netstat -rn inet 146.64.80.0/24 192.168.0.

Should "route flush" delete all routes ?

According to the man page it looks like it: The route utility provides six commands: add Add a route. flush Remove all routes. .. but I cannot get it to delete routes created with -interface option. ---