Twenty officers injured so far in Baltimore unrest: police

(Reuters) - The number of police officers injured so far in civil unrest in Baltimore has risen to 20, Captain John Kowalczyk of the Baltimore City Police Department said on Tuesday. Arson fires set during riots also left one person injured in critical condition, Kowalczyk said at a news conference. (Reporting by Barbara Goldberg; Editing by Ellen Wulfhorst)