Moto G 1st Gen :- Alarm is setting up automaitcally after every 3 minutes.

I am continuously seeing the alarm notification on the home screen (right corner) which is started few days back. I don't see any alarm setup in the Clock->Alarm option.But observed that it is setting up every 3 minutes after the time is reached. i see the notification in the home screen for this after locking the mobile.It does not beep though. But the cycle is continuous. I tried to setup few alarms and deleted them which did not help.
Please let me know how to get rid of it as also during the same period I received few spam calls from Samoa and Zambia ;( .
Regards
Yogesh

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