Glass windows and doors were smashed and shattered in two Prince George's County auto showrooms in a $40,000 Thanksgiving Day spree in which one Cadillac was used as a ram to break open doors and another was driven from one of the showrooms, according to county police and officials of the dealerships.

Police said the incidents began about 9 a.m. Thursday at Capitol Cadillac in Greenbelt, where the roof of an Oldsmobile convertible parked in the dealership's used-car lot was ripped open. A jack was removed from the convertible and used to smash open the glass door to the showroom.

After car keys were seized from a rack, a Cadillac Coupe de Ville was used inside the showroom "as a battering ram to break the interior glass doors," according to Daniel Jobe, manager of the dealership.

Another Cadillac, a $27,000 El Dorado, was driven from the showroom, according to authorities.

In all, eight panels of glass were broken, with jagged shards of broken glass strewn through the showroom and parking lot, according to Cliff Limon, new-car manager at the dealership.

Some time afterward, a cash register was smashed at another dealership, Otho Williams Buick-Honda in Forestville, and three windows and two glass doors were shattered there, according to an employe of the dealership.

Police arrived at the dealership about 1 p.m. after being summoned by a security company, apparently in response to the tripping of a silent alarm at the dealership.

Police said they arrested two Capitol Heights men, identified as Jeffrey Tarane Jones, 23, of Elfin Avenue, and Rufus Sanders Jr., 22, of Glacier Avenue. Jones was charged with two counts of breaking and entering and Sanders with one count, police said.

Authorities said Jones was being held last night at the county detention center in lieu of a $20,000 bond and Sanders was released on $5,000 bond.