article_snippet.sent: Police are having a difficult time investigating because of the rocks being thrown at Police," a suspect in custody in the latter case: a 20-year-old male from St. Louis County said.
article_snippet.sent: At this point police are not sure if the (shootings are) linked to the protest or not.
article_snippet.sent: The unrest carried on until about 3 a.m. and three police vehicles were damaged by rocks.
highlights_snippet.sent: Police not sure if shootings are related to protests, spokesman says .