Siliguri (West Bengal), Sep 15 - West Bengal's ruling Left Front (LF) Tuesday faced yet another electoral debacle with the opposition Congress and Trinamool Congress alliance wresting the Siliguri Municipal Corporation in North Bengal after 27 years of uninterrupted Left rule.

According to the district administration, the opposition alliance secured 30 seats while the LF managed to get only 17.

'People of Siliguri have been seeking a change for long. But the CPI-M (Communist Party of India-Marxist) stood in the way by using muscle power and money power. This time, they could vote for a political change ignoring the CPI-M's intimidation,' Trinamool Congress chief and Railway Minister Mamata Banerjee said.

'We welcome this spontaneous decision of common people and dedicate this victory to the Ma-Maati-Manush (mother-land-people). The Left Front should immediately resign,' she said.

'Ma-Maati-Manush' has been Banerjee's slogan in the run-up to the April-May Lok Sabha polls.

There are altogether 47 wards in Siliguri Municipality.

Trinamool Congress won in 14 seats while its ally Congress secured victory in 15 municipal wards. A Trinamool Congress supported independent candidate, Ranjan Sil Sharma, also won.