  We present the results of high resolution co-temporal and co-spatial
photospheric and chromospheric observations of sunspot penumbral intrusions.
The data was taken with the Swedish Solar Telescope (SST) on the Canary
Islands. Time series of Ca\,II H images show a series of transient jets
extending roughly 3000 km above a penumbral intrusion into the umbra. For most
of the time series jets were seen along the whole length of the intruding
bright filament. Some of these jets develop a clear $\lambda$-shaped structure,
with a small loop appearing at their footpoint and lasting for around a minute.
In the framework of earlier studies, the observed transient $\lambda$ shape of
these jets strongly suggests that they are caused by magnetic reconnection
between a curved arcade-like or flux-rope like field in the lower part of the
penumbral intrusion and the more vertical umbral magnetic field forming a
cusp-shaped structure above the penumbral intrusion.
