Damage from Neighboring Unit/Landlord

[James Letchford]

One of my tenants just contacted me and let me know that the unit (that is owned by another landlord and occupied by a tenant) sprung a leak from the washer unit in the laundry room. The water from the leak has seaped under the shared wall between the units, saturating the drywall and underneath my laminate flooring.

I contacted my insurance company to look for their suggested course of action, but they didn't really help much. I don't think I should be responsible for the damages.

Can anyone make some solid suggestions? Is this damage on the neighboring landlord or renter?

Thanks in advance.