A convoy of cars led by West Bengal BJP president Dilip Ghosh was on Saturday attacked in West Bengal North 24 Parganas district, triggering a scuffle between activists of the saffron party and the ruling Trinamool Congress, police said. While the BJP accused the Trinamool Congress of attacking the rally at Minakha, the ruling party denied the charge and alleged that workers of the saffron camp ransacked its party office in the area. Police said that at least two vehicles, which were at the rear part of the saffron party The BJP launched Parivartan Yatra rallies ahead of the assembly election in the state, which is likely to be held in April-May. The BJP also claimed that four party workers were injured after bombs were hurled at two tableaus. The police, however, said that no bombs were used in the attack and there was no report of any casualty. Activists of the two parties were engaged in a scuffle after the vehicles were attacked, police said. Four BJP karyakartas are in critical condition after crude bombs were thrown on two tableaus, West Bengal TMC leaders alleged that BJP workers vandalised their party office in the area. A few days ago, BJP leader Fitoze Kamal Gazi alias Babu Master was injured in an attack in Minakha area. BJP national president JP Naddas convoy was attacked in December last year in South 24 Parganas district.