A two-car crash in Lyttelton has led to four people being injured this morning.
Emergency services were called to the scene of the crash on Park Terrace at about 10.15am.
A St John spokesman said one person is in critical condition, one suffered moderate injuries and two suffered minor injuries.
The person in critical condition is being transported to Christchurch Hospital.
A Fire and Emergency spokesman said one person had to be extricated after becoming trapped in their vehicles.
