Though there was no official confirmation about any casualties during the clashes, the incident triggered an unprecedented spat between Chief Minister Mamata Banerjee and Governor Keshari Nath Tripathi, whom she accused of acting like "a BJP block president" and "threatening" her.
The Raj Bhavan voiced surprise over Banerjee's "attitude and language", and said, "the Hon'ble Governor cannot remain a mute spectator of the affairs in the state."
The violence between two communities at Baduria under Basirhat sub-division in the district started last night over the post following which a young man was arrested, the police said today.
A violent mob put up road blockades at several places and attacked members of other community, besides destroying many shops, they said.
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Shops were shut down in Baduria as tension prevailed there and spread to adjacent areas like Keosha market, Banshtala, Ramchandrapur and Tentulia, the police said.
Several incidents of communal clashes have been reported in the state during recent times.
Banerjee, while strongly reacting to her conversation with Tripathi over the incident, said she felt so offended that "I once even thought of leaving (quitting as chief minister)".
A Raj Bhavan statement quoted Tripathi as having said nothing happened during the talks over which Banerjee should feel "insulted, threatened or humiliated".
It said that the governor asked the chief minister to ensure peace and law and order by all means.
Condemning the riots, Banerjee said, "This is a serious issue, let me handle it seriously."
She said after the arrest of one person, there should not have been any further trouble. "We were awake last night (to control it)."
Banerjee said, "The ruling party at the Centre has an agenda. They have formed a 'Gau Raksha group' to kill people. A 'hate group' was formed to foment riots. Riots are taking place in the name of Hindu Samhati."
"More than 2,000 Muslims attacked Hindu families. Bombs went off at many places and information of Hindu sisters and daughters being raped has also been received. Local workers (of BJP) have said many facilities, including five BJP offices, were set on fire," Vijayvargiya, who is based in Delhi, said.
Banerjee said, "Someone had posted something objectionable on Facebook. He was arrested. Where is the fault of my government."
Official sources in Delhi said the clashes were triggered last evening over the Facebook post about a holy site.
A demonstration was held in front of the Baduria police station by the people belonging to one community.
In an indirect reference to Prime Minister Narendra Modi's Israel visit, Banerjee said, "He is going abroad to forge unity and the country is on fire. This must be stopped."
She said, "I told police yesterday to stop it. They should have blocked the Facebook account. But, how many Facebook accounts can be blocked? If the police had opened fire, 200 people would have been killed."
State BJP President Dilip Ghosh said if the governor asked her about the incident, where was the question of her being insulted.
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