London - England international brothers Mako and Billy Vunipola have both extended their contracts with Saracens, the English Premiership club announced on Wednesday.
Loosehead prop Mako, 24, joined Saracens from Bristol in 2011, with number eight Billy, 22, arriving from Wasps two years later.
Saracens did not disclose the length of their contracts, but said that the players had signed "multi-year extensions".