Air India — lost my headphones from check in baggage

Address:

Chandigarh, Punjab, 160020

I traveled to to bhopal from chandigarh in flight no.437 on 01.2.2018. I leave my baggage (Only one bag) at check in counter before getting boarding pass. When i received my bag at bhopal airport i found my headphone (Of google mobile) missing from bag zipper pocket. These things are being seen on social media that the bags open in the plane (Baggage section). But it was really strange for me.