  From analysis of data produced by the BABAR experiment, the first upper
bounds (90% C.L.) were obtained on the branching ratios $Br(\tau \to e
\gamma\gamma)<2.5 \times 10^{-4}$ and $Br(\tau \to \mu \gamma\gamma)<5.8 \times
10^{-4}$. In addition, improved upper bounds (95% C.L.) were found on branching
ratios $Br(\tau \to e X)<1.4 \times 10^{-3}$ and $Br(\tau \to \mu X) <2.0
\times 10^{-3}$, where $X$ is an undetected weakly interacting boson with mass
$m_X<1.6$ GeV/$c^2$.
