CONNECTICUT - State police say a new anti-terrorism measure began today as K-9 teams patrolled Metro-North trains.

Officials say the dogs will work with Amtrak security and transit police, and are primarily trained to sniff out explosives. They are part of the state's $1.8 million anti-terrorism program designed to ward off potential attacks.

Gov. Dannel Malloy (D-Conn.) says although the K-9s are a valuable safety tool, commuters still need to play their part.

State police say there is no imminent terrorist threat they're aware of and it is just an additional safety measure.