Reports said the man had died in Kolkata, where he had been brought from Basirhat on Tuesday in critical condition. Photograph: (Twitter)
Fresh violence was reported on Thursday from Basirhat in West Bengal's North 24 Parganas district.
ANI reported that protesters had blocked a road and that tear gas was used on them.
PTI reported that police had to lathi-charge the protesters.
Media reports added that one person, who had been injured in the communal violence that broke out on Monday evening, had died.
The reports said he had died in a Kolkata hospital, where he had been brought from Basirhat on Tuesday in critical condition.
The reports added that 21 people had been injured in the violence, and that eight of the injured had been brought to Kolkata.
PTI however added that Baduria town was limping back to normal.
ANI also reported that BJP President Amit Shah had constituted a team that would visit areas affected by the violence, and report back to him.
WB: Fresh violence reported in Basirhat following imposition of section 144 after clash over FB post; protesters block road. Tear gas used— ANI (@ANI_news) July 6, 2017
WB Social media post row: Team constituted by Amit Shah will visit affected area in West Bengal, will submit report to the party's President— ANI (@ANI_news) July 6, 2017
Earlier, a curfew was imposed in West Bengal's North 24 Parganas district on Wednesday following violent clashes between two communities over a Facebook post, ANI reported.
Paramilitary forces were also deployed in Baduria and Basirhat areas of the district -- where the violence took place.
Earlier on Wednesday, Section 144 prohibiting the assembly of more than four people was imposed in Baduria and Basirhat.
India’s Ministry of Home Affairs had asked for a detailed report from the West Bengal government over the clashes.
ANI had also reported that internet services have been interrupted following the incident.
According to PTI, the clashes began Monday evening after a post about a holy site.
West Bengal chief minister Mamata Banerjee had said she felt humiliated -- and had thought of quitting -- after the governor called her over the violence.
"The way the governor spoke to me was like a BJP block leader. I was threatened, humiliated, I thought of leaving (quitting)... I was so insulted," media reports quoted her as saying.
"The governor has not elected me. The people have elected me. The governor's behaviour was unacceptable. How dare he talk to me about law and order?"
ANI meanwhile reported the governor, KN Tripathi, as saying the "governor cannot remain a mute spectator of the affairs in the state".
And that "there was nothing in the talks for which CM may have felt threatened, humiliated. Asked CM to ensure peace, law & order by all means."