The wife of Ukraine’s spy chief, Lt Gen Kyrylo Budanov, is being treated in hospital for suspected poisoning with heavy metals, a Ukrainian intelligence source has confirmed to the BBC.

Marianna Budanova had fallen ill, the source said, giving no further information about whether anyone else was being treated.

Several Ukrainian media outlets earlier published similar information.

Ukraine’s military intelligence has not publicly commented on the reports.

The reports did not say whether or not Russia was thought to be behind the alleged attack.