The Indianapolis City-County Council has voted to sue the city to halt the mayor's roll-out of the nation's largest municipal fleet of electric-powered vehicles.

In a counter move, Vision Fleet, the company enlisted by Mayor Greg Ballard to provide the vehicles and guide their rollout, has filed a legal challenge to the council's vote by filing a petition with Marion Superior Court challenging the council's authority to alter the agreement.

Vision Fleet filed its petition on June 8 shortly after the council's vote. A five-judge panel will review the petition and provide a ruling. Vision Fleet has already rolled out nearly 200 of the vehicles into the city's fleet.

"For the past two months, we've felt like the rope in a game of tug-of-war between the City and the Council," said Michael Brylawski, Vision Fleet's chief executive. "We're stuck in the middle, just trying to do the job we were hired to do."

The city began rolling out the electrified vehicles under Mayor Ballard's Freedom Fleet initiative in November. The initial plan involved adding 425 battery-electric vehicles and plug-in hybrids to the fleet by 2016.