"The work is continuing and the cause will be known when the investigation is over," he was quoted as saying by the Anatolia news agency. "Witnesses say it was a LPG vehicle. Some even say that someone was smoking around," Cerra said.
Sarigul after arriving at the site in the Maslak district – on Istanbul's European side – said that workers (at the station) and firefighters both said it was an LPG explosion and nothing else should be looked for behind it."
He then condemned the use of LPG that has been the cause of accidents in the past: "Those LPG vehicles should be banned. They are like suicide bombers," Sarigul said.
The roof of the filling station caved in from the impact of the blast and the windows of the shop inside the station were shattered, metal was scattered all around.
A 26-year-old service station attendant is reportedly in serious condition.
The NTV news channel quoted unnamed police officials as saying that a bomb might have caused the blast.
"There was an incredible bang and I saw flames rising," Hasan Yalvac, a customer who witnessed the incident, told NTV. "I saw pieces of metal flying in the air and the roof collapsed over us."
Another witness said "it was like a bomb."