Emergency services are responding to a two vehicle crash on Kinross Street near Opawa Street this afternoon at 2.43pm
Two ambulances were seen on the scene of the crash.
A Police spokesperson said they have closed parts of the road around the area, and one person is seriously injured.
UPDATE - 4.30pm
Hato Hone St John were notified of an incident on Kinross Street in Blenheim at 2:40pm, and responded with one ambulance, one first response unit and one helicopter.
One patient was treated and transported to Wairau Hospital in a critical condition.