Following repeated incidences of fire in low-floor buses, manufacturer Tata Motors admitted that most vehicles involved did have a mechanical fault.
Of the eight buses, three have reported trouble with the brake system.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/buses-had-technical-flaws-tata-motors
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng-buses
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-transport-corporation-dtc
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tata-motors
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi