Tension prevailed in parts of Mangalore while calm prevailed in Shimoga town on Wednesday which witnessed violent protests over an article purportedly written by Bangladeshi writer Tasleema Nasreen

Unidentified persons had thrown a petrol bomb on the office of Kannada Prabha, a prominent Kannada daily which had carried the translated version of Nasreen's purported article in its Sunday edition, besides stoning a local English eveninger here last night.