The Police Service of Northern Ireland has said that a 66-year-old man has been arrested under the Terrorism Act, following an attack on the Dunmurry police station in south Belfast on Saturday night.
The PSNI said searches were ongoing in both east and west of Belfast.
Dissident republican group the New IRA has claimed responsibility for the attack, having also claimed responsibility for a similar incident in Co Armagh recently.
The PSNI previously described the attack as "reckless".
It is understood that a delivery car was hijacked and a gas cylinder placed in the boot.
The driver was ordered to drive the car to Dunmurry police station, where it was subsequently abandoned before the gas cylinder exploded outside the station as people were being evacuated. Nobody was injured.
"What this type of device may have lacked in terms of its sophistication and scale, it more than made up for in its reckless unpredictability," said PSNI Deputy Chief Constable Bobby Singleton.
"Thanks to the swift actions of police, no one has been injured, which is nothing short of miraculous."
He described it as a "cowardly attack", adding that it was an extremely traumatic experience for the delivery driver whose car was hijacked.
Read More: PSNI to launch high visibility operation across NI
Watch: PSNI releases video of 'reckless and stupid' car bomb attack
Earlier today, Assistant Chief Constable Davy Beck said a high-visibility policing operation would be launched across Northern Ireland to counter the dissident republican threat.
Assistant Chief Constable Davy Beck said the policing operation would involve more vehicle checkpoints and officers on patrol, which "may cause some inconvenience to the general public".
"Communities across Northern Ireland will see an increase in policing activity as a high visibility policing operation gets under way to counter the ongoing dissident threat," he said.
"We have concerns about threats across Northern Ireland from dissident groups, particularly in the wake of the recent attack on Dunmurry police station, which demonstrated a clear intent to damage and disrupt communities and potentially injure and kill police officers and staff.
"Our job is to keep communities safe and also our officers who bravely serve to protect these communities.
"We are taking every reasonable step to do so. However, we need the active support of our communities to do this.
"This operation will involve more vehicle checkpoints and patrolling officers.
"This may cause some inconvenience to the general public, however, we are asking for patience and the support of communities as we work hard to keep us all safe."
Watch: Moment car bomb explodes outside Belfast police station
Yesterday, the PSNI released footage of the moment the car bomb exploded.
The footage shows a person walking along a path before a large flash of light erupts ahead.
Additional reporting by Conor Macauley
