Six of the injured were sent to hospital, Selangor fire department director Wan Md Razali Wan Ismail told broadcaster Astro Awani.
Operations to try to tackle the blaze are ongoing.
There are people trapped in houses in Kampung Kuala Sungai Baru and rescue efforts are ongoing, Selangor Disaster Management Committee chairman Mohd Najwan Halimi told state news agency Bernama.
The Selangor fire department said the blaze has affected homes.
Images carried by news outlets and footage shared on social media showed a massive fire and a huge orange flame on the horizon with smoke billowing out.
A large flame rose from a leak in a pipeline that is about 500 metres long in the town of Puchong, the department said, adding that Petronas has closed the valve on the burning pipeline.
The fire department said it was still investigating the extent of the fire in the residential area. (Reuters)
