Recent Results on Pentaquark Searches from STAR

We have examined the $p$+K$^+$ and $\overline{p}$+K$^-$ invariant mass distribution and observe a peak structure with approximately 4-5 sigma statistical significance in d+Au collisions at $\sqrt{s_ {NN}}$ 200 GeV and Au+Au collisions at 62.4 GeV. The apparent mass of the observed peak is at 1530 MeV/c$^2$. Its width is consistent with detector resolution. The nature of the peak is under active investigation. If confirmed as a particle, this state would be manifestly exotic with uuud-$\overline{s}$ quark structure. The observed yield is estimated to be very small. No signal above combinatoric background was observed in STAR p+p and Au+Au collisions at 200 GeV from RUN II. New analysis results from larger data samples of Run IV Au+Au 200 GeV and Run V Cu+Cu 62.4 GeV will be reported and the status of such pentaquark searches in general will be discussed.