Four police vehicles have been damaged and 10 officers injured following an incident outside a Belfast primary school.
The police said a car being driven erratically outside the school then rammed two police vehicles.
It happened in the Knocknagoney Road area, in the east of the city, at about 0830 GMT on Thursday.
The police believe the car involved may have been stolen earlier in the Bangor area of County Down.
A man has been arrested.
All the police officers sustained minor injuries and two of the vehicles were slightly damaged, with the other two substantially damaged.
Police at Strandtown PSNI station have appealed for witnesses.