On the morning of April 1, 2026, a campaign team for Sandeep Warrier, the United Democratic Front (UDF) candidate in Cheruvathur constituency, was allegedly attacked by a group of Communist Party of India (Marxist) (CPI(M)) activists at the local bus stand. The incident occurred around 9:30 a.m. when a five-member team arrived to promote their campaign. They were reportedly intercepted by CPI(M) worker Krishnan and headload workers affiliated with the Centre of Indian Trade Unions (CITU), who attempted to manhandle the campaigners and destroy their materials. Warrier, upon hearing of the incident, rushed to the scene but was also blocked from entering the area. He condemned the actions of the CPI(M) members, asserting that every candidate has the right to campaign freely in a democratic society. Following local intervention, the attackers retreated, allowing Warrier to continue his campaign in Cheruvathur town. In response, the CPI(M) released a video claiming to counter UDF's allegations, showing individuals from outside the state participating in their campaign activities.