Unexplained biting in daycare

[Boymum24]

Hi, my lb is 2years 8 months & has been in daycare since he was 8 months old. In November 22 he moved to a new daycare setting, he's there 3 full days a week & has settled in well. But there's been about 5 incidents that they've told me he's bit out at other children & apparently there doesn't seem to be a pattern/trigger & other than this his moods good & there's no other behavioural issues.
I've asked for more info regarding this behavior as it's not something we've witnessed at home & I'm unsure how to approach it with him as he's unable to verbally tell me fully himself. I've told the daycare to tell him firmly no & remove him from the situation to let him know it's wrong, as that's what I'd do if any of my boys misbehaved at home.
They've said it's probably worth getting in touch with the health visitor to discuss, but as I haven't witnessed these incidents or type of behaviour I don't know how to discuss in full with a third party especially as there's no signs pointing to anything else ie:behavioural issues etc.
I've worked & with ASEN children & in behavioural units within school's for last 15 years, so I'm pretty clued in to picking up triggers & certain behaviours that lead to outbursts & I also have two older son's who both thankfully avoided the biting stage so I'm just looking for some advice on how to approach this to hopefully get him over it as quickly as possible!!

Many thanks!

Have they explained when the incidents have happened?
So, has someone took a toy from him?
Someone playing with something he wants?

They have to know what happened prior to the biting.

But, a lot of 2 year olds bite. Can be to show frustration, can't express verbally how they feel and so on.

I would ask for a chat with key worker/manager to try and get a better understanding of what is happening and how.
You can ask your HV to join you if you feel you need abit extra support and they'll know the right things to ask.

When we had a similar thing, we got a book called 'teeth are not for biting' - nursery staff recommended it and so would use the same phrases that dd was hearing when we reading at home

@SunshineClouds1 apparently they are sporadic incidents & there's no pattern or trigger, he's just approaching children & biting. This is what I'm finding hard to understand as in my line of work I've learnt over the years that 99% of the time there's a reason behind all certain behaviours.

The fact that he's so settled, happy & we'll behaved rest of day makes no sense to me at all! Is it just an attention thing? A bad habit he's got into by witnessing? And as it's not happening at home I feel helpless to know how to approach it.

@JJJSchmidt thank you I'll look into that now x