Weba “mass exodus” led to numerous injuries after a “possible chemical agent” and fireworks were deployed during a baltimore pride event saturday, according to police. Webbaltimore pride event disrupted by possible chemical agent, causing panic and injuries. A possible chemical agent was released in front of the main stage at the. Webseveral people were injured saturday evening after a large crowd of attendees fled a baltimore pride event where a possible chemical agent was released. Webthe alert indicated that foreign terrorist organizations, such as isis, and their supporters might exploit the large gatherings associated with pride events.