The mob set fire to four trucks and a private car, the police said adding it also made an effort to set ablaze a godown.
Five fire tenders later controlled the blaze, the police said.
The incident is a fall-out of a clash between two groups in the railway yard in Shalimar in which two persons were injured on April 7.
One of the two, Binod Singh, brother of a Howrah Municipal Corporation councillor, died in hospital this morning.