Armed police have arrested four men on suspicion of possession of a firearm at Talbot Green.
South Wales Police responded to an incident at a car wash in Swansea at around 2:40pm on Tuesday after receiving reports of a group of men in a 4X4 had made threats with weapons.
Officers later pulled over a vehicle which matched the description at Talbot Green and the arrests were made.
South Wales Police have stressed it is not being treated as a terrorist incident.
Armed officers were called to a Spar in Rhyl after reports of a man with a firearm last night.
North Wales Police say they arrested a man at a nearby house and recovered an imitation firearm.