  We present the preliminary results of a search for leptoquark ($LQ$) pairs
using (85.2 $\pm$ 3.7) pb$^{-1}$ of $p{\bar p}$ collider data collected by the
DO experiment at the Fermilab Tevatron from 1994-1996. We observe no evidence
for leptoquark production and set a limit on $\sigma (p{\bar p} \to LQ\bar{LQ}
\to \nu\nu + jets)$ as a function of the mass of the leptoquark ($M_{LQ}$),
assuming BR($LQ \to \nu q$)=100%. At the 95% confidence level, we exclude
scalar leptoquarks for $M_{LQ} < 99 GeV/c^2$, and vector leptoquarks for
$M_{LQ} < 178 GeV/c^2$.
