A tense situation prevailed outside the Congress office on Meston Road in Kanpur on Sunday when BJP workers staged a protest over alleged derogatory remarks against Prime Minister Narendra Modi and his mother during Rahul Gandhi's Voter Adhikar Yatra in Bihar, police said.

About 3 pm, a large number of BJP workers, including members of the party's Mahila Morcha, gathered outside Tilak Hall, the Congress office, shouting anti-Congress slogans and vowing to surround the premises, officials said.

In response, Congress workers armed with sticks assembled in and around the office, raising fears of a possible confrontation, they added.