Twenty-nine people died and more than 70 were injured when gunmen stormed a Hindu temple in western India, a police official said on Tuesday.

Authorities earlier put the death toll at 23.

"We think more than 100 people could still be inside the temple," K. K. Mysorewala, a state intelligence police inspector, told Reuters.

The gunmen who stormed the temple in Gandhinagar, capital of western Gujarat state and opened fire indiscriminately, were believed to still be inside.

Mysorewala said the attack had stoked fears of communal unrest in Gujarat's main city Ahmedabad, scene of bloody Hindu-Muslim violence in February and March this year. "There is tension and fear in Ahmedabad. People are scared that something could happen at night," he said.