Unionized Grand River Transit workers have rejected a deal for a new contract with the Region of Waterloo.

The tentative deal was reached about a week ago, but members of Unifor Local 4304 did not agree to the proposal.

Local 4304, who represents 644 workers, have been without a contract since the end of 2016 and negotiations for a new contract began in December.

Buses will continue to run as usual this morning as both sides go back to the negotiation table.

Workers are still in a legal strike or lockout position, but the union must give two days notice before a strike can take place, if an agreement can't be reached.

Unifor Local 4304, represents the transit service's drivers, service attendants, fleet mechanics and dispatchers.