SAN DIEGO (AP) The San Diego Chargers plan to ask voters in November to approve an increase in the city's hotel tax to build a combined stadium and convention center annex downtown.

The Chargers say they need to gather 66,447 signatures from registered voters by mid-June to place the initiative on the Nov. 8 ballot.

The initiative comes after the Chargers were rebuffed by NFL owners in their attempt to build a stadium with the rival Oakland Raiders in a Los Angeles suburb.

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It would raise the hotel tax to 16.5 percent, among the highest on the West Coast.

The Chargers say they would contribute $350 million, which could be offset by personal seat licenses and naming rights. The NFL would contribute $300 million, including a $200 million loan.

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Online: http://pro32.ap.org/poll and http://twitter.com/AP-NFL