Nearly 100 officers have been hurt since violence broke out in the city on Monday, Baltimore Police said.
Capt. Eric Kowalczyk said Thursday afternoon that more than 40 officers required some sort of treatment at the hospital. Protesters have been throwing bricks, bottles and other items at officers trying to contain demonstrations after the death of Freddie Gray, a black man who suffered critical injuries while he was in police custody.
Kowalczyk also said that more than half of the people detained during Monday's riots have been released without charges. He said 201 people were arrested during the riots and 106 of them were subsequently released after 48 hours because specific charges couldn't be filed.
He said police are reviewing surveillance footage and expect to charge many of those people once their identities have been confirmed.
Gray was arrested after he made eye contact with an officer and ran. Officers chased him down and handcuffed him behind his back. Bystander videos recorded police loading him, dragging his legs, into one of two metal compartments in the back of the van.
Police earlier said the van stopped once so that officers could put Gray in "leg irons" because he had become "irate;" stopped again because the driver asked for an additional unit to check on Gray's condition, and then again to put an additional prisoner in the van's other compartment before arriving at the station.
Now police are saying an additional stop was made before the driver asked officers to check on his condition. They said nothing about this stop other than its location — at what appears to be a desolate intersection with three vacant lots and a corner store.
Last week, Police Commissioner Anthony Batts had said the second prisoner told investigators the driver did not speed, make sudden stops or "drive erratically" during the trip, and that Gray was "was still moving around, that he was kicking and making noises" up until the van arrived at the police station.
Police say nearly a dozen people were arrested last night after curfew.