Police in santa cruz are looking for the person or persons responsible for throwing chunks of concrete into a house overnight Monday. The incident occurred at 1:15 a.m. Tuesday, when the residents at the Grandview street house were awoken by 5-blocks of concrete, that were thrown through a front window. 1 of the chunks landed on a teenage girl, leaving her with minor injuries that did not require medical care. No suspects were immediately located after the incident.