Leader of the Opposition L K Advani on Thursday spoke to Prime Minister Manmohan Singh and requested that he should seek a report from West Bengal Governor on the Nandigram violence, calling it one of the most unfortunate events since Independence.

"Advani wanted to speak to him on Wednesday night itself, but the prime minister was not available. Dr Singh returned the call on Wednesday morning and Advani requested him to ask for the Governor's report on the entire episode," a source close to the former deputy prime minister said.

On Wednesday night, Advani spoke to Home Minister Shivraj Patil and made the same request.

In a major flare-up of violence on Wednesday in protest against the acquisition of land for industries in Nandigram, 11 people were killed and 75 others injured when police opened fire on a violent crowd that fought pitched battles with the men in uniform.