SAN DIEGO–Homicide detectives are investigating the death of a 40 year-old male who was in the custody of agents of the United States Customs and Border Protection at the San Ysidro Port of Entry.

On Wednesday evening, officers received a call to assist medics at the San Ysidro Port of Entry with a man who was not breathing. Officers arrived along with the medics and discovered agents from the United States Customs and Border Protection performing CPR on the male. Medics continued CPR on the man and transported him to Sharps Chula Vista Hospital, where he was pronounced dead that evening.

The preliminary investigation has revealed the man had crossed into the United States through the pedestrian walkway. As he came through the port of entry, agents directed the man into a second inspection area. During the agent’s investigation, the man was un-handcuffed and walked into the security office for further investigation. A criminal records check revealed he had an outstanding felony warrant for his arrest. As agents attempted to take him into custody, he jumped over the processing counter and attacked an agent. Additional agents responded to assist in restraining the man. He would not comply with the agents instructions and had concealed his hands from the view of the agents. One agent used his taser in an attempt to stop the man’s combative behavior. He became unresponsive and stopped breathing. The agents began CPR until medics and additional officers arrived to assist.

Four Customs and Border Protection agents received moderate injuries during the struggle and were transported to a local hospital for treatment. The cause of the man’s death is unknown at this time, pending the medical examiners investigation. The male has been identified, but his name will not be released until his family can be notified.