Expressing concern over deaths of 12 babies in a state-run hospital, West Bengal Chief Minister Mamata Banerjee today regretted that government hospitals badly lacked proper infrastructure and had turned into "dens of vested interests".

Banerjee, who is also looking after the health portfolio, warned that her government would not tolerate politics in state-run hospitals.

The government has undertaken an exercise to revamp the health department to improve infrastructure and services, she said.

"Although the hospital authorities are insisting that the deaths occurred because of enteric diseases and that they (babies) were brought at the last stage, I have asked them to declare the name of the disease," the chief minister said.

A committee comprising of two doctors has been formed to look into the deaths and Home Secretary G D Gautama has been asked to submit a report on the matter within 24 hours, she said.

"If any medical negligence is proved in the case, nobody will be spared from top to bottom and we will not see any political colour," she warned.

She noted that once 75 babies had died in the same hospital and the authorities had pleaded that it was "normal".