A strike by San Francisco Symphony musicians has caused the cancellation of another concert Friday night, according to symphony officials.

The musicians announced the strike on Wednesday, prompting the symphony to cancel a concert that had been scheduled for Thursday, then a second one tonight.

The musicians and symphony management negotiated for 13 hours Thursday and early Friday morning but have not yet come to a resolution. More talks are scheduled for today, symphony officials said.

The musicians are unhappy with a proposal by management that would include a pay freeze in the first year and 1 percent increases in the next two years.

Although they make an average of more than $165,000, the third-highest total for a symphony in the country, the musicians say expensive instruments and the costs of living in the Bay Area hurt their ability to compete with other top orchestras.

People with tickets to Friday night's canceled concert at Davies Symphony Hall can receive a refund, exchange them for tickets for another concert or donate the money to the symphony.

Information about the options is available by calling the symphony's box office at (415) 864-6000 or visiting online at www.sfsymphony.org.

Concerts are also scheduled for Saturday and Sunday. An update on the status of those concerts will be released on Saturday, according to symphony officials.