This heroic pet dog repeatedly barked to alert its owner about a deadly cobra lurking outside their house in Thailand.

The Thai Bangkaew dog named Boo Boo noticed the deadly 3ft-long snake crawling along the home's wall in Udon Thani province on June 8.

Owner Naruemon Chaimart checked to see what had made the seven-month-old dog so angry and discovered an agitated Boo Boo confronting the cobra. She hurriedly called rescuers to get rid of it from her property.

To escape Boo Boo's wrath, the venomous reptile slithered through the grilles connected to the family's restroom. Volunteers reportedly had difficulty catching it because of the narrow space, but finally pulled it out by removing the grates temporarily.

They also advised Naruemon to install a net protecting the grilles to prevent other wild animals from sneaking through it.

The relieved homeowner said: 'This is the third time Boo Boo has alerted us to the presence of snakes in our house. She has saved our lives.'

Cobras are highly venomous and kill tens of thousands of people a year across Southeast Asia and the Indian sub-continent.