GREAT FALLS, Mont. (AP) — Montana law enforcement agencies are learning how to respond to an attack on a nuclear weapons convoy.

Malmstrom Air Force Base is working with local authorities to plan for what Malmstrom security planner Stan Moody says could become a critical situation.

To date, there have been no attacks on convoys, but the agencies say they are prepared.

Local agencies could be the first to respond to any incident that occurs off base or away from guarded nuclear sites.