Lt. Gov. David Dewhurst and former Texas Solicitor General Ted Cruz have both agreed to a third televised debate on the first day of early voting in their hotly contested GOP runoff for an open U.S. Senate seat.

The King Street Patriots, a Houston-area Tea Party group, and Fox 26, a Houston-based affiliate, are scheduled to host a televised debate in front of a live audience Monday at 6 p.m. Details on airings statewide weren't immediately clear.

Both campaigns confirmed they would participate in Monday's event.

The two Republicans have already participated in two televised debates, both in Dallas. The first one, in June, was hosted by KERA, the Dallas public television affiliate. The Texas Tribune was a partner in that event. The second debate was on Tuesday and hosted by Belo.

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