A 28-year-old man remained in police custody after a police officer was injured when he was carried for up to 30 metres on the bonnet of a car in Derry.
A second officer was also hurt after he was struck by the vehicle on Skeoge Link Road on Monday.
Police said the man had been arrested on suspicion of several offences including attempted murder, assault on police and dangerous driving.
He is also accused of driving while disqualified and using a motor vehicle without insurance.
One of the officers suffered an injury to his arm after he was hit by the car, while the other sustained hand, elbow and hip injuries after he was carried on the bonnet of the vehicle before falling off.
Mark Lindsay, chair of the police federation, said more protection was needed for officers following an increase in "violent assaults".
It also comes after a petrol bomb was thrown at a police officer in the Creggan area of Derry last month, while officers were also targeted with petrol bombs following an Easter parade in the city last month.
Just last week, a PSNI vehicle was damaged when a group of up to 30 people - mostly youths - gathered at the scene of a car crash in Creggan and threw masonry at officers.
Mr Lindsay said he believes "there's an acceptance that it's all part of the job".
"Any democratic society has to have a proper police service and we have a police service that works very much with our communities," he told the BBC.
"But when some elements of that community turns on policing then I think it is incumbent that those with political influence do everything they can to ensure that we move away from this.
"These officers are members of their own community, these officers are drawn from right across society, and they shouldn't be subjected to this for simply trying to do their jobs."
