ARLINGTON, Va. (AP) -- CACI International Inc., a provider of information-technology services to the U.S. military, said Wednesday the Army increased the value of a communications contract by $97.9 million.

The increase in the contract to support the Army Project Manager, Tactical Radio Communications Systems, raises the potential value of the four-year contract to $189.6 million.

CACI won the contract in October 2006.

The Army's tactical radio communications systems connect warfighters and first responders to each other and to military and government decision-makers.

The new award includes both an expansion of current tasks and new tasks.