An Iraq War veteran that was severely injured Tuesday in Oakland, California amid a clash between anti-Wall Street demonstrators and officers, was upgraded this morning to fair condition, reports the San Francisco Chronicle.

Scott Olsen, 24, a Marine veteran, had been in critical condition Wednesday.

A group known as Iraq War Veterans Against the War, of which Olsen is a member, said the veteran suffered a skull fracture he was hit by a “blunt object.” Video footage from the scene showed that while Olsen was being attended to by other protesters, an officer was seen tossing something, possibly a tear gas canister toward people trying to help him, according to the report.

Oakland Police Chief Howard Jordan said at a news conference that the incident will be investigated and treated as if a police had fired his or her gun, reports the Associated Press.

"It's unfortunate it happened. I wish that it didn't happen. Our goal, obviously, isn't to cause injury to anyone," the chief said, according to the AP.

See footage below of the moment Olsen was injured at a clash: