SAN DIEGO (AP) _ San Diego Mayor Kevin Faulconer is questioning whether the Chargers are serious about staying in the city, the latest salvo in rapidly deteriorating negotiations over a new stadium for the NFL team.

Faulconer’s comments Wednesday came one day after the Chargers shot down his trial balloon for a city election this year on financing a stadium. The team says the mayor’s proposal won’t satisfy state election and environmental laws.

The mayor says the city can complete an environmental review by Oct. 1 and hold an election Jan. 12. The vote would occur around the same time that the league may start considering applications for teams to move to Los Angeles.

The Chargers and Oakland Raiders plan to jointly build a stadium in Carson, near Los Angeles.