Four police vehicles have been rammed in Melbourne's north on the same day new laws with mandatory jail terms came into effect for the offence.
Two men, aged 26 and 27, were arrested on Thursday following crashes at Bundoora and in an underground carpark in Preston, allegedly involving a stolen Porsche.
Officers used capsicum spray to subdue the pair who were arrested and are being questioned.
Tough new laws take effect on Thursday, including minimum two-year jail terms, stretching through to 20 years in the slammer for the most serious offences.
Anyone who drives a car at a police or emergency services vehicle, or directly at an officer, could be charged using the new laws.
But "special circumstances" can change the mandatory terms.
