It was called:
Baptistina... a 170-km-diameter body (carbonaceous-chondrite-like) that broke up 160 Myr ago in the inner main asteroid belt. Fragments produced by the collision were slowly delivered by dynamical processes to orbits where they could strike the terrestrial planets. We find that this asteroid shower is the most likely source (>90 per cent probability) of the Chicxulub impactor that produced the Cretaceous/Tertiary (K/T) mass extinction event 65Myr ago.
Probably just a couple of quick hits today. Looks like it will be a busy one, workwise.