PPP Chairman Bilawal Bhutto on Tuesday launched a train 'march' dubbed "Caravan-i-Bhutto" from Karachi to Larkana in connection with the 40th death anniversary of Zulfikar Ali Bhutto.

Bilawal began the train journey by reciting a poem to pay tribute to his grandfather.

According to PPP Sindh president Nisar Khuhro, the march is part of the PPP's attempts at launching a mass contact campaign with a power show on ZAB's death anniversary.

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The party's chairman will travel from Karachi to Larkana, making brief stopovers along the way at Rohri, Sukkur and Habib Kot, where he will address workers, Khuhro said earlier this week.

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In Larkana, a public meeting will take place in Garhi Khuda Bakhsh Bhutto where all arrangements have been made to facilitate participants. Bilawal and party co-chairman Asif Ali Zardari, along with other central and provincial leaders, will address the gathering.

Bilawal, at a stop in Landhi, took to criticising his political opponents, saying that the ruling regime doesn't tolerate the opposition and its criticism.

He alleged that police force was used against party workers in Punjab, that PPP candidates were not allowed to run their election campaigns in Khyber Pakhtunkhwa and were attacked in Lyari. He alleged that the "worst-ever rigging" in history took place in the 2018 General Election.

Similar remarks followed during a stop in Hyderabad.

"In Malakand, unknown persons engaged in rigging. Our Form-45 is missing to this date. In Lyari, Rangers did their bit and our Form-45 is still missing. They tried their best in Larkana too but could not win. After 20 years a Bhutto reached the Assembly and the fact is a thorn in their side," the PPP leader said.

"Whatever they could not achieve through rigging, they have now set out to achieve through NAB-thuggery. We do not object to accountability. We believe that when fair accountability takes place, democracy is further strengthened.

"But we do not accept political vengeance and political engineering under the guise of accountability," said Bilawal.

In a statement, former president Zardari thanked those who welcomed his son.

"God and the people are Bilawal Bhutto's protectors," he said adding that Bilawal was with the people of the country.

"The people are Bilawal Bhutto's political heirs," Zardari said.

He thanked the party activists who were taking part in the "Caravan-i-Bhutto" and said that Bhutto's love for the people and their love for Bhutto would never end.