  In this paper we establish the \emph{space-like} strong unique continuation
for nonlocal equations of the type $(\partial_t - \Delta)^s u= Vu$, for $0<s
<1$. The proof of our main result, Theorem 1.1, is achieved via a conditional
elliptic type doubling property for solutions to the appropriate extension
problem, followed by a blowup analysis.
