Emergency services are responding to a single motorbike crash on Christchurch's Akaroa Rd near Bayleys Rd, Birdlings Flat.
The crash was reported about 5pm, police said in a statement
One person is in a critical condition and the Serious Crash Unit has been advised.
The road is closed while emergency services work at the scene.
Motorists are advised to expect delays, the statement said.
