Teamsters truck drivers at 99 Cents Only Stores voted Tuesday night to authorize a strike after negotiations on an initial contract fell through, the Los Angeles Times reported.

A strike by the 65 union drivers, which would hit the retailer’s 153 stores in Southern California at the peak of the holiday shopping season, could begin at any time, the newspaper said. The two sides have been negotiating on a contract for nine months, with no agreement in sight.

Drivers for the discounter usually earn $10.50 to $14 an hour with no vacation or sick days, the newspaper said. The International Brotherhood of Teamsters want a raise of up to $1 an hour, while the company offered 15 cents an hour per year. If a strike does happen, the union is prepared to pay the drivers $475 a week for six months in strike pay.

99 Cents Only also uses non-union contract drivers, so the extent of any disruption from a strike is unknown, the Times said.