Six police officers have been injured in two cross-border vehicle ramming incidents in south Armagh
Three PSNI vehicles were also damaged in the collisions.
The incidents in the Crossmaglen area unfolded in the early hours of Sunday, and details were released on Monday evening. Police said all six officers require time off work to recover.
The first incident occurred at around 3.30am in Crossmaglen.
PSNI officers working in partnership with gardaí had been alerted to a vehicle that had crossed the border on its way towards the village.
Police said the white Citroen Berlingo van was located in the Lismore area but before the driver could be spoken to, the police vehicle was rammed along with a taxi bus before the van made off.
Two officers were injured.
The second incident took place shortly after 5am and involved two other police vehicles providing assistance to officers carrying out inquiries into the earlier collision in Lismore.
Police said a dark-coloured Audi A6, which was travelling on the Dundalk Road towards Crossmaglen, rammed two police cars after being signalled to stop, before making off.
Four officers were injured.
PSNI Sergeant Sam Hoey said: "Following these two incidents we now have six officers, who were out working to keep the people of south Armagh safe, off work with their injuries and three police vehicles off the road.
"We are appealing to anyone with any information which could assist us to trace the drivers of these vehicles to contact police in Ardmore on 101 or Crimestoppers anonymously on 0800 555111."