west midlands police
A bomb disposal team has been sent to inspect the device.
The postcard is 'extremely valuable'.
'We are devastated by the loss of our daughter.'
The woman's husband is also seriously injured with stab wounds.
They were held in London and Birmingham.
The girls went missing on Friday night.
A police cordon was in place.
Police are not treating the death as suspicious.
Victim was attacked with a 'bladed weapon'.
The victim hasn't yet been formally identified.