An Oxnard police officer shot a 24-year-old man who officials say was holding a knife early Friday. The man, an Oxnard resident, was transported to Ventura County Medical Center in critical condition, the Oxnard Police Department said in a release. No update on the man's condition was available as of midday. The incident is the Oxnard agency’s third shooting by a police officer since March 12. During Friday's incident, an officer was called to a two-story apartment building at 235 E. Seventh St. around 12:15 a.m. to assist Oxnard firefighters with an "uncooperative subject" needing medical attention, according to the police account.