A McDonald's restaurant on Riccarton Road, in Christchurch was in lockdown this evening.
Police confirmed it was called to an event on Riccarton Road, but the lockdown has been lifted.
A spokesperson said it appeared the store was evacuated after someone overheard a conversation about guns.
One customer says the restaurant was evacuated after an alleged gun threat about 5.30pm.
He said a siren was put on after a few minutes and everyone began evacuating the building.
