US STOCKS-Wall St falls on simmering Greece worries, tepid data
* IMF warns Greece needs debt extension
* June nonfarm payrolls increase less than expected
* Average hourly earnings unchanged
* Seven of the 10 S&P sectors down
* Indexes down: Dow 0.26 pct, S&P 0.18 pct, Nasdaq 0.32 pct (Updates prices)
By Sweta Singh
July 2 (Reuters) - U.S. stocks extended losses on Thursday after the International Monetary Fund warned Greece may need a large debt writeoff, and muted U.S. jobs data dampened the economic outlook.
Seven of the 10 major S&P sectors were in the red in afternoon trading, after a positive opening.
IMF's warning comes as Greece readies for a Sunday referendum on an international bailout deal that Prime Minister Alexis Tsipras has urged voters to reject. Continuación...