Violent protesters in Baltimore, Maryland injured several police officers on Monday, throwing bricks and rocks at the overwhelmed cops hiding behind riot armor. While most of the cops tried not to engage with the protesters, at least one officer was seen throwing the rocks right back at the mostly-young groups of rioters even as the nation watched on live TV. A photo taken by photographer Patrick Semansky captures the moment one police officer threw a rock back at protesters while his fellow cops looked on. Scroll down for video . Approved police weapon? A Baltimore police officer was pictured Monday night lobbing a piece of rock back at protesters . And a video of one intense interaction between a group of rioters and police showed a similar scene, though it's unclear whether the clip captured the same officer. Baltimore Police did not immediately return Daily Mail Online's request for comment Tuesday morning. Fifteen police officers were injured Monday - two seriously - in the clashes with angry mobs rioting over the death of Freddie Gray. About 27 people have been arrested after looting local businesses and setting several buildings on fire as revenge for Gray's death. Baltimore Mayor Stephanie Rawlings-Blake has promised that the rioters will be held accountable for the damage they have caused. Maryland Governor Larry Hogan also announced a state of emergency and called the National Guard to come and help local police. Tuesday night, a curfew will be put in place from 10pm until 5am. Gray died on April 19 from spinal trauma, a week after he was arrested and possibly injured while in police custody. The Department of Justice is currently investigating whether officers who arrested Gray on April 12 caused the fatal trauma. On the offensive: Above, a young man throws a brick at police following the funeral of Freddie Gray in Baltimore, Maryland on Monday . Back and forth: Fifteen police officers were injured in the clashes with protesters Monday night, including two who were in a serious condition .
Fifteen Baltimore police officers were injured Monday night in clashes with rioters angry over the death of Freddie Gray .
While most the officers appeared peaceful in their control of the crowds, one officer was pictured lobbing a rock back at rioters .