"Obviously in a fire, several things can happen so we will find out more once all those present have been spoken to and a full scene examination has been carried out."
There were no people in the house when the fire broke out, although Fitzell said firefighters on the scene did believe there might be a person trapped inside.
"At the time, there was a belief there may have been people inside the house, so obviously they wanted to get into the house and make sure anyone there was safe."
Volunteer fire crews from Eltham and Toko also attended the callout.
Fitzell said the firefighter lives with his wife and children in Stratford.
Fire and Emergency central communications shift manager Murray Dunbar said the fire broke out just before 4.30am in Seyton St, Stratford.
A neighbour says she woke up to what she at first thought was the sound of fireworks.
"It was like the crackling sound you get from fireworks, with then louder noises which I realised was the sound of glass breaking, so I went out to see what was happening."
When outside, the neighbour saw smoke billowing out of the home, so called the fire brigade.
Fire safety officers would be investigating the cause of the blaze, which was being treated as suspicious.
