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TORONTO, ONTARIO--(Marketwire - Nov. 26, 2007) - YAMANA GOLD INC.

(TSX:YRI)(NYSE:AUY)(LSE:YAU) today announced a mine, near-mine and regional exploration update. These results continue to demonstrate unrealized value at Yamana's principal operations and additional value created from potential discoveries resulting from Yamana's exploration efforts.

El Penon, Chile

At the El Penon mine, drilling has discovered a new high-grade vein in the footwall of the Al Este vein. The vein intercepts were obtained as part of the infill drilling program at Al Este. The new vein has been intersected along a strike length of 700 metres and a dip length of 150 metres, however, the best grades are currently in the southern end of the structure. The best results to date include (all true width):

Hole      From     To     Width(m)      Au(g/t)      Ag(g/t)      Aueq(g/t)
----      ----     --     --------      -------      -------      ---------
SPA0012    256    260        1.72        58.93        2,686         102.96
SPA0053    310    315        2.07         4.14        482.5          12.05
SPA0099    272    288        4.75         7.21          296          12.06
SAI0063    246    260        5.68        43.43        1,615          69.90

The discovery of this vein with its high-grade precious metals values along with Bonanza, Esmeralda and Al Este confirm the interpretation of this area as a new centre of high-grade mineralization for El Penon (Figure 1 attached). All of these new vein discoveries occur within a kilometre of each other and are located less than one kilometre from underground development at Cerro Martillo.

These results corroborate Yamana's view that there is unrealized value at El Penon derived from continued precious metals production at high grades along with a longer mine life and the potential to increase annual gold production through a combination of high-grade areas and increased throughput.

Yamana is advancing its plans to increase throughput and production of precious metals at El Penon through the development of new veins at higher grades with production expected to increase from over 420,000 gold equivalent ounces in 2008 to over 500,000 gold equivalent ounces in 2010.

Jacobina, Brazil

At the Jacobina mine complex, drilling has continued to focus on Canavieiras and on Morro do Vento east, both high-grade, near-mine targets in addition to two regional targets including Pindobacu on which drill data was previously reported. At Canavieiras, 19 holes totaling 11,497 metres have been completed this year to infill and extend down dip previously identified mineralization along a two kilometre extension of conglomerate reefs.