A policeman's leg has been broken during a wild arrest in Geelong, with two teenagers arrested and accused of a crime spree.

The officer, believed to be an AFL umpire, had rushed to the scene to box in a stolen car on Yaraan Street in Bell Park shortly before 2am on Thursday.

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But as police arrested the 16-year-old female passenger, the car drove off and struck the girl as well as a leading senior constable.

Security footage captured snippets of the wild scene. Credit: Supplied

It then sped away, crashed into a divisional van and was followed to Ballarat Road where it rammed another police vehicle.

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The driver, a 19-year-old man, was arrested and taken to hospital.

Security camera footage from the night shows the dramatic incident, including audio in which a voice can be heard screaming "I need help".

An officer can be heard screaming, "My f****** member got run over by a f****** car".

A 19-year-old man and teenage girl are in custody after an allegedly stolen car hit an officer and two police vehicles in Geelong. Credit: 7NEWS

The teenagers are accused of carrying out a five-day crime spree, which included burglaries, thefts and high-speed driving.

The policeman is in hospital receiving treatment for a fractured leg.