Mayawati said the BJP government should also take strict steps in this regard and ensure that the tribals get back the land.
The party leaders and workers gave a warm welcome to Gandhi on her arrival at the Lal Bahadur Shastri International Airport here around 10 am.
Uttar Pradesh Deputy Chief Minister Dinesh Sharma on July 20 alleged that lands of Dalits and tribals used for farming were grabbed by the Congress.
Gandhi spent July 19 night at the Chunar guesthouse, insisting she will not return to Delhi unless she meets the families of the victims.
Family members of the Sonbhadra clash victims on July 20 met Congress general secretary Priyanka Gandhi at the Chunar guesthouse in Mirzapur district, where she spent a night in detention.
Priyanka Gandhi was on July 19 detained and stopped from going to Sonbhadra where 10 people were gunned down this week, triggering a standoff with the BJP government in Uttar Pradesh.
Speaker N P Prajapati adjourned the House for five minutes amid the uproar by members of ruling Congress during the Question Hour.
In Lucknow, Congressmen spent the night at the GPO Park before the statue of Mahatma Gandhi in solidarity with Priyanka.
Priyanka Gandhi was detained and stopped from going to Sonbhadra in Uttar Pradesh on July 19.
Priyanka Gandhi Vadra was July 19 detained and stopped from going to Sonbhadra where 10 people were gunned down this week, triggering a standoff with the BJP government in Uttar Pradesh.
Section 144 of the Criminal Procedure Code (CrPC) empowers an executive magistrate to prohibit an assembly of more than four persons in an area.
The party had announced on July 19 that a team of its MPs will visit on July 20 the families of the Sonbhadra clash victims in Uttar Pradesh.
The Congress on July 19 also targeted the Uttar Pradesh government over the detention of Priyanka Gandhi, with former party chief Rahul Gandhi terming it as "illegal arrest".
The BJP supremo further claimed that the BSP had been "pressuring" the the administration to ensure justice to the Victims.
About the incident, the UP CM said that 29 persons including main accused Yagya Dutt have been arrested.